Firefox je jedan od popularnih web preglednika u svijetu interneta. Za pravilno funkcioniranje preglednika potreban vam je otključan profil. Ako se slučajno zaključa, primit ćete poruku, Firefox je već pokrenut, ali ne odgovara^{(Firefox is already running, but is not responding)} . Također, ako Firefox nije ispravno zatvoren i radi u pozadini, suočit ćete se s istim problemom. Postoji mnogo razloga koji uzrokuju problem pa nastavite čitati.

Kako popraviti da Firefox već radi u sustavu Windows 10^{(How to Fix Firefox is Already Running in Windows 10)}

Svi podaci koje pohranjujete u Firefoxu^(Firefox) prikupljaju se u Firefox profilu. Ovaj profil je pohranjen na lokalnom disku za pohranu. Ako nešto nije u redu s Firefoxom^(Firefox) , možete koristiti ovu mapu pohranjenu na vašem računalu. Kada ponovno instalirate preglednik, svi se podaci mogu vratiti ako je potrebno. Iz razloga dosljednosti i stabilnosti, ponekad vaš preglednik zaključava vaš profil što znači da je vaš preglednik zaključan. U ovom slučaju, aplikacija koristi ovu profilnu datoteku za pokretanje preglednika, čime se pokreće problem. Evo nekoliko razloga zbog kojih Firefox već radi, ali ne reagira na problem:

• Nekoliko Firefoxovih^(Firefox) zadataka izvodi se u pozadini, ali nije vidljivo.
• Kada se Firefox sruši usred pregledavanja, suočit ćete se s istim problemom.
• Firefox je ažuriran, no promjene se ne odražavaju u pregledniku.
• Ponekad se Firefox zamrzne zbog prisutnosti programskih bugova pa su svi zadaci preglednika ostavljeni u pozadini.
• Oštećena^(Corrupt) predmemorija i proširenja u pregledniku.
• Bilo kakve greške u korisničkom profilu i nekompatibilne postavke preglednika.

U ovom odjeljku sastavili smo popis metoda koje će vam pomoći da riješite problem. Metode su raspoređene prema težini i učinkovitosti istih. Slijedite ih istim redoslijedom kako biste postigli savršene rezultate.

Metoda 1: Ponovno pokrenite računalo^{(Method 1: Restart PC)}

Prva i glavna metoda za rješavanje problema bilo kojeg PC-a je ponovno pokretanje računala. Ponovno pokretanje računala popravit će sve privremene probleme povezane s njim i pomoći vam da popravite sve sukobe preglednika. Slijedite dolje navedene upute za ponovno pokretanje računala ili alternativno isključite računalo i ponovno ga pokrenete.

1. Idite na  radnu površinu ^(Desktop ) pritiskom na tipke  Windows + D keys  istovremeno.

2. Sada istovremeno pritisnite tipke  Alt + F4 keys  . Vidjet ćete skočni prozor kao što je prikazano u nastavku.

3. Sada kliknite na padajući okvir i odaberite  opciju Ponovno pokretanje ^(Restart ) .

4. Na kraju pritisnite  Enter  za ponovno pokretanje sustava.

Metoda 2: Ponovo pokrenite Firefox^{(Method 2: Restart Firefox)}

Možete ručno prekinuti sve procese Firefoxa^(Firefox) slijedeći dolje navedene korake.

1. Pokrenite Upravitelj zadataka^{(Task Manager)} pritiskom na tipke Ctrl + Shift + Esc keys istovremeno.

2. Na kartici Procesi^(Processes) odaberite Firefox proces.

3. Konačno, kliknite na Završi zadatak^{(End task)} i ponovno pokrenite ^(reboot) računalo^(the PC) .

4. Sada ponovno pokrenite preglednik Mozilla Firefox .

Također pročitajte: ^{(Also Read:)} Kako riješiti problem s crnim zaslonom Firefoxa^{(How To Fix Firefox Black Screen Issue)}

Metoda 3: Otvorite Firefox u načinu za rješavanje problema^{(Method 3: Open Firefox in Troubleshoot Mode)}

Ponovno pokretanje Firefoxa^(Firefox) u načinu za rješavanje problema onemogućit će sva proširenja, isključiti hardversko ubrzanje i umjesto toga koristiti zadane postavke alatne trake, teme. To će vam pomoći da riješite da Firefox već radi, ali ne reagira na problem, kao i da desni klik na Firefox ne radi^{(Firefox right click not working)} . kao i Firefox desni klik ne radi^{(Firefox right click not working)} problem. Dakle, da biste ponovno pokrenuli Firefox u načinu za rješavanje problema, slijedite dolje navedene korake:

1. Pokrenite Firefox i kliknite na izbornik aplikacija^{(Application Menu )}

2. Odaberite opciju Pomoć^{(Help )}

3. Kliknite na Način rješavanja problema^{(Troubleshoot Mode)}

Napomena:^{(Note: )} Također možete pritisnuti tipku Shift dok otvarate Firefox da biste ga pokrenuli u načinu rješavanja problema.

4. Potvrdite upit klikom na Restart

5. Ponovno^(Again) potvrdite upit klikom na Otvori^(Open)

Napomena:^{(Note: )} Da biste isključili način rješavanja problema, slijedite korake 1 i 2 i kliknite Isključi način za rješavanje problema^{(Turn Troubleshoot Mode off )}

Metoda 4: Isključite hardversko ubrzanje (ako je primjenjivo)^{(Method 4: Turn Off Hardware Acceleration (If Applicable))}

Možda ćete se suočiti s problemom ako vaš preglednik ima problema s grafičkim procesorima i postavkama upravljačkog programa. Možete ga pokušati isključiti slijedeći dolje navedene korake:

1. Pokrenite Firefox i kliknite na ikonu Izbornik^{(Menu )}

2. Kliknite na Postavke^{(Settings )} s padajućeg izbornika

3. Kliknite karticu Općenito^{(General )} u lijevom oknu i pomaknite se prema dolje do izbornika Performanse^{(Performance )}

4. Poništite ove opcije:

• Koristite preporučene postavke izvedbe^{(Use recommended performance settings)}
• Koristite hardversko ubrzanje kada je dostupno^{(Use hardware acceleration when available )}

5. Pritisnite i držite Ctrl + Shift + Q keys zajedno kako biste zatvorili preglednik

6. Konačno, ponovno pokrenite preglednik^{(Relaunch the browser)} .

Također pročitajte: ^{(Also Read:)} Kako popraviti Firefox koji ne reproducira videozapise^{(How to Fix Firefox Not Playing Videos)}

Metoda 5: Podesite proširenja^{(Method 5: Tweak Extensions)}

Ako imate bilo kakva problematična proširenja omogućena u vašem pregledniku, možda ćete se suočiti s pogreškom da Firefox već radi, ali ne reagira. Da biste ih riješili, ili ažurirajte proširenja (kako biste ispravili greške) ili ih onemogućite u svom pregledniku. Evo nekoliko uputa za ažuriranje i onemogućavanje proširenja Firefoxa .^(Firefox)

Opcija I: Ažurirajte proširenja Firefoxa^{(Option I: Update Firefox Extensions)}

Ako imate bilo kakva problematična proširenja omogućena u vašem pregledniku, možete ih pokušati ažurirati kako biste riješili da tipkovnica^(Keyboard) ne radi u Firefoxu^(Firefox) .

1. Kliknite na ikonu Izbornik^{(Menu )} u Firefoxu, a zatim na Dodaci i teme^{(Add-ons and themes)}

2. Kliknite na Postavke^(Settings)

3. Kliknite na Extensions & Themes

4. Kliknite na Postavke^(Settings) i odaberite opciju Provjeri ažuriranja^{(Check for Updates )}

5A. Slijedite upute na zaslonu^{(on-screen instructions)} da biste ažurirali svoje proširenje.

5B. Ako se ništa ne mora ažurirati, onda- Nisu pronađena ažuriranja. Ponovno pokrenite ^{(No updates found. Restart)} Firefox da provjerite jeste li riješili problem

Opcija II: Onemogućite proširenja Firefoxa^{(Option II: Disable Firefox Extensions)}

Ako niste postigli nikakav popravak ažuriranjem proširenja za Firefox , možete ih onemogućiti slijedeći dolje navedene korake.

1. Pokrenite Firefox i kliknite na ikonu Izbornik^{(Menu )}

2. Odaberite Dodaci i teme^{(Add-ons and themes )}

3. Kliknite na Proširenja^{(Extensions )} u lijevom oknu i isključite^{(toggle off)} proširenja

4. Isto tako, onemogućite sva proširenja jedno po jedno i provjerite koje proširenje uzrokuje problem

5. Na kraju, ako ste identificirali koje proširenje vam stvara probleme, kliknite na ikonu s tri točke koja^{(three-dotted icon )} mu odgovara i odaberite opciju Ukloni^{(Remove )}

Metoda 6: Izbrišite predmemoriju preglednika^{(Method 6: Clear Browser Cache)}

Privremene datoteke poput oštećene predmemorije preglednika mogu uzrokovati prekide u vezi krajnjeg korisnika. To može dovesti do problema o kojem se raspravlja kada surfate internetom. Pokušajte izbrisati predmemoriju preglednika i provjerite jeste li ispravili pogrešku. Evo nekoliko uputa za uklanjanje predmemorije preglednika Firefox .

1. Pokrenite web preglednik Firefox .

2. Kliknite na ikonu Izbornik^{(Menu )} u gornjem desnom kutu zaslona

3. Odaberite opciju Postavke^{(Settings )} s padajućeg popisa

4. Kliknite na opciju Privatnost i sigurnost^{(Privacy & Security )} u lijevom oknu

5. Kliknite gumb Očisti podatke^{(Clear Data)} za kolačiće i podatke web-mjesta^{( Cookies and Site Data)}

6. Poništite okvir Kolačići i podaci web^{(Cookies and Site Data )} -mjesta i potvrdite okvir Spremljeni web-sadržaj^{(Cached Web Content)} .

7. Konačno, kliknite gumb Očisti^{(Clear )} za brisanje kolačića iz predmemorije Firefoxa .^(Firefox)

Također pročitajte: ^{(Also Read:)} Popravite pogrešku Server Not Found u Firefoxu^{(Fix Server Not Found Error in Firefox)}

Metoda 7: Omogućite prava pristupa za mapu profila Firefox^{(Method 7: Enable Access Rights for Firefox Profiles Folder)}

Ako pokušate pristupiti bilo kojem sadržaju datoteke koji ima samo prava samo za čitanje, možda ćete se suočiti s problemom o kojem se raspravlja. Provjerite jeste li dodijelili odgovarajuća prava pristupa mapi profila slijedeći dolje navedene korake.

1. Kliknite tipke Windows + E keys da biste otvorili File Explorer

2. Kopirajte i zalijepite donju stazu^(path) u adresnu traku

C:\Users\USERNAME\AppData\Roaming\Mozilla\Firefox

3. Desnom tipkom miša kliknite mapu Profili i odaberite ^(Profiles)Svojstva^(Properties)

4. Na kartici Općenito^{(General )} poništite okvir Samo za čitanje (odnosi se samo na datoteke u mapi)^{(Read-only (Only applies to files in folder) )}

5. Konačno, kliknite na Primijeni^{(Apply )} , a zatim OK za spremanje promjena

Metoda 8: Izbrišite datoteku zaključavanja profila Firefoxa^{(Method 8: Delete Firefox Profile Lock File)}

Ako se Firefox nenormalno sruši, datoteka zaključavanja ostaje u vašem File Exploreru^{(File Explorer)} . Ova datoteka može ometati normalne funkcije preglednika što dovodi do navedenog problema. Savjetujemo vam da izbrišete ovu datoteku za zaključavanje profila prema uputama u nastavku kako biste riješili problem s Firefoxom^(Firefox) koji već radi.

1. Pritisnite i držite Windows + E keys zajedno da biste otvorili File Explorer

2. Zalijepite sljedeći put^(path) u navigacijski izbornik i pritisnite tipku Enter^{(Enter key)}

%APPDATA%\Mozilla\Firefox\Profiles\

3. Otvorite mapu koja završava s .default

4. Pomaknite^(Scroll) se prema dolje i desnom tipkom miša kliknite datoteku parent.lock i izbrišite

Napomena:^{(Note: )} Ako pokrećete Firefox s opcijama naredbenog retka -no-remote , uklonite ovo.^(-no-remote)

Također pročitajte: ^{(Also Read:)} Ispravite pogrešku da vaša veza nije sigurna na Firefoxu^{(Fix Your Connection is not Secure Error on Firefox)}

Metoda 9: Ažurirajte Firefox^{(Method 9: Update Firefox)}

Firefox često objavljuje ažuriranja kako bi ispravio greške u njemu. Možete ažurirati Firefox kako biste riješili problem s Firefoxom^(Firefox) koji je već pokrenut prema uputama u nastavku.

1. Otvorite Firefox i kliknite na Izbornik^{(Menu )} kao što je prikazano

2. Odaberite opciju Pomoć^{(Help )}

3. Kliknite na O Firefoxu^{(About Firefox)} .

4A. Na ekranu se pojavljuje novi prozor . ^(Window)Ovdje provjerite je li vaš Firefox ažuriran^{(Firefox is up-to-date)} .

4B. Inače, slijedite upute na zaslonu^{(on-screen instructions)} za ažuriranje Firefoxa

Metoda 10: Ažurirajte Windows^{(Method 10: Update Windows )}

Microsoft pokušava poboljšati sve svoje verzije sustava Windows kako bi doveo računalo bez ikakvih grešaka. Bugove i probleme povezane s preglednikom na računalu sa sustavom Windows^(Windows) 10 možete popraviti tako da ga ažurirate. Slijedite dolje navedene korake da biste ažurirali Windows i riješili problem s Firefoxom .^(Firefox)

1. Istovremeno pritisnite tipke  Windows + I keys  za pokretanje  Postavke^(Settings) .

2. Kliknite na   pločicu Update & Security , kao što je prikazano.^{(Update & Security)}

3. Na kartici  Windows Update  kliknite gumb  Provjeri ažuriranja^{(Check for updates)}  .

4A. Ako je novo ažuriranje dostupno, kliknite  Instaliraj sada^{(Install Now)}  i slijedite upute za ažuriranje.

4B. Inače, ako je Windows ažuriran, prikazat  će se^{(You’re up to date)}  poruka Ažurni ste.

Također pročitajte: ^{(Also Read:)} Kako omogućiti anonimni način rada u Chromeu^{(How to Enable Incognito Mode in Chrome)}

Metoda 11: Napravite novi Firefox profil^{(Method 11: Create New Firefox Profile)}

Izrada novog profila za Firefox riješit će uobičajene probleme povezane s korisničkim profilom. Evo nekoliko jednostavnih uputa za stvaranje novog profila kako biste riješili problem s Firefoxom .^(Firefox)

1. Pritisnite tipke Windows + R keys zajedno kako biste otvorili dijaloški okvir Pokreni^{(Run )}

2. Upišite firefox.exe –P i pritisnite tipku Enter^{(Enter key)} .

3. Kliknite na gumb Kreiraj profil....^{(Create Profile… )}

4. Kliknite na Sljedeće^{(Next )} u Čarobnjaku za izradu profila^{(Create Profile Wizard)} .

5. Upišite novi naziv profila u polje Unesite naziv novog profila^{(Enter new profile name )}

6. Konačno, kliknite na Završi^{(Finish )} za dovršetak postupka

7. Sada ćete ponovno biti navigirani do Upravitelja profila^{(Profile Manager )} . Ponovno pokrenite Firefox^{(Start Firefox)} s tamo navedenim novim profilom. Ne biste se trebali suočiti s problemom da Firefox već radi, ali ne reagira^{(Firefox is already running but is not responding)}

Metoda 12: Osvježite Firefox^{(Method 12: Refresh Firefox)}

Osvježavanjem vašeg preglednika Firefox će spremiti;

• Oznake
• Povijest pregledavanja i preuzimanja
• Lozinke, kolačići
• Podaci o automatskom popunjavanju web-obrasca
• Osobni rječnik 

Ali briše sljedeće podatke.

• Proširenja i teme
• Dozvole za web stranicu
• Izmijenjene postavke
• Dodane tražilice
• DOM pohrana
• sigurnosni certifikat i postavke uređaja
• Akcije preuzimanja
• Korisnički^(User) stilovi i prilagodbe Alatne trake .^(Toolbar)

Napomena:^{(Note: )} Nakon osvježavanja preglednika, vaš stari Firefox profil bit će postavljen na radnu površinu s mapom pod nazivom Old Firefox Data . Iz ove mape možete vratiti svoje podatke Firefoxa^(Firefox) na svoj novi profil. Ako vam ova mapa nije potrebna, možete je izbrisati bilo kada.

1. Otvorite Firefox i kliknite na ikonu Izbornik^{(Menu )}

2. Kliknite na opciju Pomoć^{(Help )}

3. Odaberite opciju Više informacija o rješavanju problema^{(More troubleshooting information )}

4. Kliknite na Osvježi Firefox^{(Refresh Firefox)}

5. Opet kliknite na opciju Osvježi Firefox^{(Refresh Firefox )}

6. Kliknite Završi^{(Finish )} u prozoru Čarobnjaka za uvoz^{(Import Wizard)}

7. Konačno, kliknite na Let’s go! Opcija za nastavak surfanja svojim pregledavanjem

Također pročitajte: ^{(Also Read:)} Kako popraviti Chromeu je ponestalo memorije^{(How to Fix Chrome Ran Out of Memory)}

Metoda 13: Ponovno instalirajte Firefox^{(Method 13: Reinstall Firefox)}

Ako imate oštećene instalacijske datoteke u Firefoxu^(Firefox) , ovaj problem možete jednostavno riješiti ponovnim instaliranjem preglednika Firefox . Slijedite dolje navedene korake da biste ponovno instalirali preglednik Firefox i riješili problem s Firefoxom^(Firefox) koji je već pokrenut.

1. Kliknite na Start , upišite Control Panel i pritisnite tipku Enter^{(Enter key)} .

2. Postavite View by > Large icons i kliknite na Programi i značajke^{(Programs and Features )}

3. Kliknite na Firefox i odaberite opciju Deinstaliraj^{(Uninstall )}

4. Potvrdite upit ako postoji i pričekajte dok se preglednik ne deinstalira na vašem uređaju. Zatim ponovno pokrenite računalo^{(reboot your PC)}

5. Preuzmite preglednik Mozilla Firefox sa službene web stranice^{(official website)} .

6. Pokrenite Firefox Installer dvostrukim klikom na datoteku setup.exe.

Preporučeno:^{(Recommended:)}

• Popravite da se Teamviewer ne povezuje u sustavu Windows 10^{(Fix Teamviewer Not Connecting in Windows 10)}
• Popravi pogrešku sustava Windows 0 ERROR_SUCCESS^{(Fix Windows Error 0 ERROR_SUCCESS)}
• Ispravite pogrešku STATUS BREAKPOINT Google Chromea^{(Fix Google Chrome STATUS BREAKPOINT Error)}
• Kako popraviti da Firefox ne učitava stranice^{(How to Fix Firefox Not Loading Pages)}

Nadamo se da vam je ovaj vodič bio od pomoći i da ste uspjeli popraviti da Firefox već radi, ali ne reagira^{(Firefox is already running but is not responding)} u sustavu Windows 10^{(Windows 10)} . Javite nam koja vam je metoda najbolja. Također, ako imate bilo kakva pitanja/prijedloge u vezi s ovim člankom, slobodno ih ostavite u odjeljku za komentare.

Fix Firefox is Already Running

Firefox is one of the popυlar web browserѕ in the internet world. For the proper functionіng of the browser, you need an unlocked profile. If it gets locked accidentally you will receive a mesѕаge, Firefox is already running, but is not responding. Also, if Firefox is not shut down properly and is running in the background, you will face the same problem. There are a lot of reasons that cause the issue so, continue reading.

How to Fix Firefox is Already Running in Windows 10

All the data you store in Firefox are collected in the Firefox profile. This profile is stored in a local storage disk. If anything is wrong with Firefox, you can use this folder stored on your PC. When you reinstall the browser, all the data can be restored if needed. For consistency and stability reasons, sometimes your browser locks your profile which indicates that your browser is locked. In this case, the application uses this profile file to run the browser, thereby triggering the issue. Here are some reasons that causes Firefox is already running, but is not responding issue:

• Several Firefox tasks are running in the background, but not visible.
• When Firefox crashes in the middle of browsing, you will face the same issue.
• Firefox is updated, yet changes are not reflected in the browser.
• Sometimes, Firefox freezes due to the presence of application bugs thus all the browser tasks are left in the background.
• Corrupt cache and extensions in the browser.
• Any glitches in the user profile and incompatible browser settings.

In this section, we have compiled a list of methods that will help you fix the problem. The methods are arranged according to the severity and effectiveness of the same. Follow them in the same order to attain perfect results.

Method 1: Restart PC

The first and foremost troubleshooting method for any PC-related problem is restarting the computer. Rebooting the computer will fix all the temporary glitches associated with it helping you to fix all browser conflicts. Follow the below-mentioned instructions to reboot the PC or alternatively shut down the computer and start it over again.

1. Navigate to the Desktop by pressing Windows + D keys simultaneously.

2. Now, press Alt + F4 keys simultaneously. You will see a pop-up window as shown below.

3. Now, click on the drop-down box and select the Restart option.

4. Finally, hit Enter to reboot your system.

Method 2: Restart Firefox

You can manually terminate all the Firefox processes by following the below-mentioned steps.

1. Launch Task Manager by hitting Ctrl + Shift + Esc keys simultaneously.

2. In the Processes tab, select Firefox process.

3. Finally, click on End task and reboot the PC.

4. Now, again launch the Mozilla Firefox browser.

Also Read: How To Fix Firefox Black Screen Issue

Method 3: Open Firefox in Troubleshoot Mode

Restarting Firefox in troubleshooting mode will disable all the extensions, turn off hardware acceleration, and use default toolbar settings, themes, instead. This will help you fix Firefox is already running, but is not responding issue as well as Firefox right click not working issue. as well as Firefox right click not working issue.. So, to restart Firefox in troubleshooting mode, follow the below-mentioned steps:

1. Launch Firefox and click on the Application Menu

2. Select the Help option

3. Click on Troubleshoot Mode

Note: You can also press the Shift key while opening Firefox to launch it in Troubleshooting mode.

4. Confirm the prompt by clicking on Restart

5. Again, confirm the prompt by clicking on Open

Note: To turn off troubleshooting mode, follow steps 1 & 2 and click on Turn Troubleshoot Mode off

Method 4: Turn Off Hardware Acceleration (If Applicable)

You may face the issue if your browser has some issues with graphical processors and driver setups. You can try turning it off by following the below-mentioned steps:

1. Launch Firefox and click on the Menu icon

2. Click on Settings from the drop-down menu

3. Click on General tab in the left pane, and scroll down to the Performance menu

4. Uncheck these options:

• Use recommended performance settings
• Use hardware acceleration when available

5. Press and hold Ctrl + Shift + Q keys together to quit the browser

6. Finally, Relaunch the browser.

Also Read: How to Fix Firefox Not Playing Videos

Method 5: Tweak Extensions

If you have any problematic extensions enabled in your browser, you may face Firefox is already running, but is not responding error. To resolve them, either update the extensions (to fix bugs) or disable them from your browser. Here are a few instructions to update and disable Firefox extensions.

Option I: Update Firefox Extensions

If you have any problematic extensions enabled in your browser, you could try updating them to resolve Keyboard not working in Firefox.

1. Click on the Menu icon in Firefox, followed by Add-ons and themes

2. Click on Settings

3. Click on Extensions & Themes

4. Click on the Settings and select the Check for Updates option

5A. Follow the on-screen instructions to update your extension.

5B. If nothing needs to be updated then-No updates found. Restart Firefox to check if you have fixed the issue

Option II: Disable Firefox Extensions

If you did not attain any fix by updating your Firefox extensions, you can disable them by following the below-mentioned steps.

1. Launch Firefox and click on the Menu icon

2. Select Add-ons and themes

3. Click on Extensions in the left pane and toggle off the extensions

4. Likewise, disable all the extensions one by one and check which extension is causing the issue

5. Finally, if you have identified which extension is causing you the trouble, click on the three-dotted icon corresponding to it and select the Remove option

Method 6: Clear Browser Cache

Temporary files like corrupt browser cache might cause interruptions in the end-user connection. This may lead to the discussed issue when you surf the internet. Try clearing the browser cache and check if you have fixed the error. Here are a few instructions to remove the Firefox browser cache.

1. Launch Firefox web browser.

2. Click on the Menu icon at the top right corner of the screen

3. Select the Settings option from the drop-down list

4. Click on Privacy & Security option in the left pane

5. Click on Clear Data button for Cookies and Site Data

6. Uncheck the Cookies and Site Data box and check Cached Web Content box.

7. Finally, click on the Clear button to clear the Firefox cached cookies.

Also Read: Fix Server Not Found Error in Firefox

Method 7: Enable Access Rights for Firefox Profiles Folder

If you try to access any contents of the file that has only read-only rights, then you may face the discussed problem. Ensure you have granted proper access rights to the profile folder by following the below-mentioned steps.

1. Click on the Windows + E keys to open File Explorer

2. Copy and paste the below path in the address bar

C:\Users\USERNAME\AppData\Roaming\Mozilla\Firefox

3. Right-click on the Profiles folder and select Properties

4. In the General tab, uncheck the box Read-only (Only applies to files in folder)

5. Finally, click on Apply and then OK to save the changes

Method 8: Delete Firefox Profile Lock File

If Firefox crashes abnormally, the lock file is leftover in your File Explorer. This file may interfere with the normal functions of the browser leading to the said issue. You are advised to delete this profile lock file as instructed below to solve Firefox is already running problem.

1. Press and hold Windows + E keys together to open the File Explorer

2. Paste the following path in the navigation menu and press Enter key

%APPDATA%\Mozilla\Firefox\Profiles\

3. Open folder ending with .default

4. Scroll down and right-click on the parent.lock file and delete

Note: If you are starting Firefox with -no-remote command-line options, then remove this.

Also Read: Fix Your Connection is not Secure Error on Firefox

Method 9: Update Firefox

Firefox often releases updates to fix bugs in it. You can update Firefox to solve Firefox is already running problem as instructed below.

1. Open Firefox and click on the Menu as shown

2. Select Help option

3. Click on About Firefox.

4A. A new Window pops up on the screen. Here check if your Firefox is up-to-date.

4B. Else, follow the on-screen instructions to update Firefox

Method 10: Update Windows

Microsoft is trying to improve all of its versions of Windows to bring a PC without any errors. You can fix the bugs and browser-related problems in your Windows 10 computer by updating it. Follow the below-mentioned steps to update Windows and fix Firefox is already running issue.

1. Press Windows + I keys simultaneously to launch Settings.

2. Click on the Update & Security tile, as shown.

3. In the Windows Update tab, click on Check for updates button.

4A. If a new update is available, then click Install Now and follow the instructions to update.

4B. Otherwise, if the Windows is up-to-date, then it will show You’re up to date message.

Also Read: How to Enable Incognito Mode in Chrome

Method 11: Create New Firefox Profile

Creating a new Firefox profile will resolve common problems associated with the user profile. Here are a few simple instructions to create a new profile to fix Firefox is already running issue.

1. Press the Windows + R keys together to open the Run dialog box

2. Type firefox.exe –P and hit Enter key.

3. Click on Create Profile… button.

4. Click on Next in Create Profile Wizard.

5. Type a new profile name in the Enter new profile name field

6. Finally, click on Finish to complete the process

7. Now, you will be navigated to the Profile Manager again. Start Firefox again with a new profile listed there. You shouldn’t face Firefox is already running but is not responding issue

Method 12: Refresh Firefox

By refreshing your browser, Firefox will save;

• Bookmarks
• Browsing and download history
• Passwords, Cookies
• Webform auto-fill information
• Personal dictionary 

But it deletes the following data.

• Extensions and themes
• Website permissions
• Modified preferences
• Added search engines
• DOM storage
• security certificate and device settings
• Download actions
• User styles and Toolbar customizations.

Note: Upon refreshing your browser, your old Firefox profile will be placed on your desktop with a folder named Old Firefox Data. You can restore your Firefox data to your new profile from this folder. If you do not need this folder, you can delete it anytime.

1. Open Firefox and click on the Menu icon

2. Click on Help option

3. Select the More troubleshooting information option

4. Click on Refresh Firefox

5. Again, click on the Refresh Firefox option

6. Click on Finish in the Import Wizard window

7. Finally, click on Let’s go! Option to continue surfing your browsing

Also Read: How to Fix Chrome Ran Out of Memory

Method 13: Reinstall Firefox

If you have corrupt installation files in Firefox, you can easily fix this issue by reinstalling the Firefox browser. Follow the below-mentioned steps to reinstall the Firefox browser and fix Firefox is already running issue.

1. Click on Start, type Control Panel, and hit the Enter key.

2. Set View by > Large icons and click on Programs and Features

3. Click on Firefox and select the Uninstall option

4. Confirm the prompt if any, and wait until the browser gets uninstalled on your device. Then, reboot your PC

5. Download the Mozilla Firefox browser from the official website.

6. Run the Firefox Installer by double-clicking on setup.exe file.

Recommended:

• Fix Teamviewer Not Connecting in Windows 10
• Fix Windows Error 0 ERROR_SUCCESS
• Fix Google Chrome STATUS BREAKPOINT Error
• How to Fix Firefox Not Loading Pages

We hope that this guide was helpful and you were able to fix Firefox is already running but is not responding on Windows 10. Let us know which method worked for you the best. Also, if you have any queries/suggestions regarding this article, then feel free to drop them in the comments section.

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