Ako ste korisnik Firefoxa^(Firefox) , možda ste se barem jednom suočili s pogreškom SSL_ERROR_NO_CYPHER_OVERLAP . Ova pogreška NO CYPHER OVERLAP može biti povezana s problemima ažuriranja. Zaustavlja pregledavanje weba što može biti frustrirajuće. Ako imate posla s ovom greškom, na pravom ste mjestu. Donosimo vam savršen vodič koji će vam pomoći da ispravite pogrešku SSL_ERROR Firefox preglednika.

Kako popraviti Firefox SSL_ERROR_NO_CYPHER_OVERLAP u sustavu Windows 10^{(How to Fix Firefox SSL_ERROR_NO_CYPHER_OVERLAP in Windows 10)}

U nekim slučajevima Firefox ne može prikupiti sigurnosne podatke sa tražene web stranice što prvenstveno vodi do Firefox SSL_ERROR . Evo nekoliko razloga koji mogu uzrokovati ovu pogrešku:

• Pogrešna komunikacija^{(Miscommunication )} između klijenta i poslužitelja.
• Prijenos podataka^(Data) između klijenta i poslužitelja nije se mogao provjeriti^(verified) .
• Povezivanje poslužitelja i preglednika s različitim šiframa za šifriranje^{(different encryption cipher)} .
• Zastarjeli^{(Outdated )} preglednik.
• Onemogućen^(Disabled) SSL3 ili TLS.
• Antivirusni programi ometaju^{(interfering )} preglednik.
• Prisutnost zlonamjernog softvera^(Malware) .

Nakon što su pod razlozima SSL_ERROR_NO_CYPHER_OVERLAP pogreške, vrijeme je da to popravite. Evo nekoliko jednostavnih metoda koje će vam pomoći da popravite SSL_ERROR Firefox .

Metoda 1: Otvorite Firefox u sigurnom načinu rada^{(Method 1: Open Firefox in Safe Mode)}

Uobičajeni problemi u Firefoxu^(Firefox) mogu se riješiti otvaranjem u sigurnom^(Safe) načinu rada. Može popraviti Firefox SSL_ERROR_NO_CYPHER_OVERLAP . Slijedite korake u nastavku da biste ga isprobali.

1. Otvorite dijaloški okvir Pokreni pritiskom na tipke ^(Run)Windows + R keys zajedno.

2. Upišite firefox -safe-mode u  dijaloški okvir Pokreni^(Run) i kliknite OK .

3. Kliknite Otvori^{(Open )} kada se to od vas zatraži

Metoda 2: Uklonite Firefox predmemoriju^{(Method 2: Remove Firefox Cache)}

Oštećena^(Corrupt) predmemorija i kolačići u pregledniku Firefox mogu uzrokovati probleme u pristupu web stranicama što može dovesti do pogreške SSL_ERROR Firefox^{(SSL_ERROR Firefox)} . Ovaj problem možete riješiti brisanjem predmemorije Firefoxa^(Firefox) prema uputama u nastavku.

1. Otvorite novu karticu u Firefoxu^(Firefox) .

2. Kliknite na tri retka^{(three lines )} ( Otvori izbornik aplikacije^{(Open Application Menu)} ) kao što je prikazano.

3. Na padajućem popisu kliknite na Postavke^(Settings) .

4. U lijevom oknu kliknite karticu Privatnost i sigurnost .^{(Privacy & Security )}

5. Pomaknite^(Scroll) se prema dolje desno okno i kliknite na Clear Data… u odjeljku Kolačići i podaci web-mjesta^{(Cookies and Site Data )} .

6. Poništite^{(Uncheck )} okvir s oznakom Kolačići i podaci web^{(Cookies and Site Data )} -mjesta i potvrdite^(Check) okvir označen s Predmemorirani web-sadržaj^{(Cached Web Content)} .

7. Kliknite na Očisti^(Clear) . Izbrisat će predmemoriju Firefoxa.

Također pročitajte: ^{(Also Read:)} Popravite nedostatak zvuka u Firefoxu na Windows 10^{(Fix No Sound in Firefox on Windows 10)}

Metoda 3: Isključite hardversko ubrzanje^{(Method 3: Turn Off Hardware Acceleration)}

Korištenje hardverskog ubrzanja^{(Hardware Acceleration)} može rezultirati problemima s grafičkim performansama što može uzrokovati razmatranu pogrešku u vašem pregledniku Firefox . Možete isključiti opciju hardverskog ubrzanja prema uputama u nastavku.

1. Slijedite korake 1 do 3^{(Steps 1 to 3)} iz 2. metode^{(Method 2)} da biste otvorili Postavke Firefoxa^{( Firefox Settings)} .

2. Kliknite karticu Općenito i ^{(General )}poništite^{(uncheck )} okvir s oznakom Koristi preporučene postavke^{(Use recommended performance settings )} izvedbe ispod odjeljka Performanse kao što je prikazano.^{(Performance )}

3. Poništite^{(Uncheck )} okvir s oznakom Koristi hardversko ubrzanje kada je dostupno^{(Use hardware acceleration when available)} .

4. Izađite iz^{(Exit )} preglednika. Da biste to učinili, možete istovremeno pritisnuti tipke Ctrl + Shift + Q keys

Metoda 4: Ažurirajte preglednik Firefox^{(Method 4: Update Firefox Browser)}

Kao i svaki drugi program, morate povremeno ažurirati preglednik Firefox kako biste izbjegli bilo kakve softverske pogreške i bugove. Njegovo ažuriranje moglo bi riješiti pogrešku SSL_ERROR Firefoxa^{(SSL_ERROR Firefox)} . Slijedite upute u nastavku za ažuriranje preglednika Firefox .

1. Otvorite novu karticu u Firefoxu^{(Firefox )} i kliknite na ikonu Izbornik .^{(Menu )}

2. Kliknite na Pomoć^(Help) .

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

4A. Ako su ažuriranja na čekanju, počet će se preuzimati automatski prema zadanim postavkama, ako ne, slijedite upute na zaslonu za ažuriranje Firefoxa^(Firefox) . Nakon dovršetka ažuriranja vidjet ćete opciju Ponovo pokrenite Firefox za ažuriranje. ^{(Restart Firefox to Update. )}Kliknite^(Click) na njega i Firefox će se ponovno pokrenuti.

4B. Ako je Firefox već ažuriran, dobit ćete poruku Firefox je ažuriran .^{(Firefox is up to date)}

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

Metoda 5: Ažurirajte proširenja Firefoxa^{(Method 5: Update Firefox Extensions)}

Ponekad zastarjela proširenja mogu ometati pregledavanje u Firefoxu^(Firefox) . Oni također mogu uzrokovati ovu pogrešku Firefox SSL_ERROR_NO_CYPHER_OVERLAP . Savjetujemo vam da ažurirate proširenja Firefoxa prema uputama u nastavku.^(Firefox)

1. Kliknite na ikonu Izbornik u Firefoxu.^{(Menu )}

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

3. U lijevom oknu kliknite karticu Proširenja . ^{(Extensions )}Nakon toga kliknite na ikonu zupčanika koja^{(gear icon )} se nalazi desno od odjeljka Upravljajte svojim proširenjima .^{(Manage Your Extensions )}

4. Kliknite na Provjeri ažuriranja^{(Check for Updates)} .

5A. Ako su ažuriranja dostupna, slijedite upute na zaslonu da biste ih instalirali.

5B. Ako su vaša proširenja već ažurirana, dobit ćete  poruku Nema pronađenih ažuriranja kao što je prikazano.^{(No updates found)}

Provjerite rješava li problem.

Metoda 6: Onemogućite ili uklonite proširenja^{(Method 6: Disable or Remove Extensions)}

Ako ažuriranje proširenja Firefoxa^(Firefox) nije riješilo problem, savjetujemo vam da ih onemogućite iz preglednika ili ih potpuno uklonite prema uputama u nastavku.

Opcija 1: Onemogućite proširenja Firefoxa^{(Option 1: Disable Firefox Extensions)}

1. Slijedite korake 1^{(Follow Step 1)} i 2 iz metode 5^{(Method 5)} .

2. Kliknite karticu Proširenja^{(Extensions )} i isključite prekidač za^{(OFF )} svoja proširenja.

Napomena:^{(Note: )} Ovdje je Grammarly za Firefox^{(Grammarly for Firefox )} uzet kao primjer.

Onemogućite sva proširenja jedno po jedno i saznajte koje proširenje vam stvara probleme. Ovo bi trebalo riješiti problem.

Opcija 2: Uklonite proširenja Firefoxa^{(Option 2: Remove Firefox Extensions)}

Ako ste identificirali problematično proširenje koje uzrokuje pogrešku SSL_ERROR_NO_CYPHER_OVERLAP , savjetujemo vam da ga potpuno uklonite iz preglednika prema uputama u nastavku.

1. Slijedite korake 1^{(Follow Step 1)} i 2 iz metode 5^{(Method 5)} . Kliknite karticu Proširenja .^{(Extensions )}

2. Kliknite na ikonu s tri točke ^{(three dots icon )} desno od problematičnog proširenja i odaberite opciju Ukloni^{(Remove )} s padajućeg popisa.

Uklonit će proširenje iz preglednika. Provjerite jeste li ispravili pogrešku NO CYPHER OVERLAP .

Metoda 7: Privremeno onemogućite antivirusni program^{(Method 7: Disable Antivirus Temporarily)}

Antivirusni program na vašem računalu sa sustavom Windows 10 ponekad može ometati programe poput Firefoxa^(Firefox) što može dovesti do pogreške SSL_ERROR Firefox^{(SSL_ERROR Firefox)} . Privremeno onemogućite svoj antivirusni program slijedeći naš vodič za privremeno onemogućavanje antivirusnog programa u sustavu Windows 10^{(to Disable Antivirus Temporarily on Windows 10)} .

Napomena:^(Note:) Omogućite Antivirus odmah nakon što je problem riješen.

Metoda 8: Pokrenite skeniranje zlonamjernog softvera^{(Method 8: Run Malware Scan)}

Windows 10 PC ima ugrađeni sigurnosni paket^{(built-in security suite)} za otkrivanje virusa ili štetnih datoteka. Možete ga koristiti za skeniranje svih prijetnji i zlonamjernih programa koji doprinose pogrešci SSL_ERROR_NO_CYPHER_OVERLAP . Slijedite naš vodič o tome kako pokrenuti skeniranje virusa na svom računalu? ^{(How do I Run a Virus Scan on my Computer?)}. Nakon toga možete slijediti naš vodič o tome kako ukloniti zlonamjerni softver s računala u sustavu Windows 10^{(How to Remove Malware from your PC in Windows 10)} i ukloniti zlonamjerni softver.

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

Metoda 9: vratite TLS i SSL3 na zadane postavke^{(Method 9: Reset TLS and SSL3 to Default Settings)}

TLS i SSL odnose se na sigurnost transportnog sloja^{(Transport Layer Security )} i sloj sigurnih utičnica^{(Secure Sockets Layer )} . To su kriptografski protokoli koji provjeravaju autentičnost prijenosa podataka s klijenta na poslužitelj. Oni štite podatke i omogućeni su prema zadanim postavkama u vašem pregledniku. Možete resetirati njihove postavke na zadane vrijednosti prema uputama u nastavku kako biste ispravili pogrešku NO CYPHER OVERLAP .

1. Otvorite Firefox i upišite about:config u adresnu traku.

2. Kliknite na gumb Prihvati rizik i nastavi^{(Accept the Risk and Continue )} .

3. Upišite tls u polje Search preference name kao što je prikazano.

4. Ako su neke vrijednosti označene podebljanim,^{(bold, )} kliknite na Reset (simbol strelice) da promijenite njihove vrijednosti na zadane postavke.

Napomena:^{(Note: )} Podebljane vrijednosti su nedavno promijenjene. Vraćanje na njihove zadane postavke ispravit će pogrešku NO CYPHER OVERLAP .

5. Ponovite korake za resetiranje SSL3. Upišite SSL3 u polje za naziv željene postavke^{(Search preference name )} i kliknite na simbol Reset za podebljane vrijednosti SSL3.

6. Na istom zaslonu provjerite jesu li sljedeće opcije postavljene na False.

• sigurnost.ssl3.dhe_rsa_aes_128_sha^{(security.ssl3.dhe_rsa_aes_128_sha)}
• security.ssl3.dhe_rsa_aes_256_sha

Napomena^(Note) : Možete kliknuti na gumb Prebaci^{(Toggle )} za promjenu statusa iz Točno^{(True )} u Netočno^{(False )} ili obrnuto.

Metoda 10: Zaobiđite protokole za šifriranje^{(Method 10: Bypass Encryption Protocols)}

Možete poništiti nekoliko naprednih postavki u Firefoxu^(Firefox) koje bi mogle popraviti pogrešku SSL_ERROR_NO_CYPHER_OVERLAP . Ova metoda može uzrokovati sigurnosne prijetnje, ali se može implementirati kada morate zaobići sigurnosne postavke da biste pregledavali važne web stranice. Slijedite korake u nastavku da biste zaobišli protokole šifriranja u Firefoxu^(Firefox) .

Opcija 1: putem About Config^{(Option 1: Through About Config)}

1. Slijedite korake 1-3 iz metode 9.

2. Potražite sljedeće opcije jednu po jednu i kliknite na gumb Uredi^{(Edit )} i promijenite njihovu vrijednost na 0 .

• sigurnost.tls.verzija.min^{(security.tls.version.min)}
• security.tls.version.fallback-limit

3. Zatim kliknite na gumb Spremi^{(Save )} .

Opcija 2: putem O postavkama^{(Option 2: Through About Preferences)}

Evo još jednog načina na koji možete zaobići protokole šifriranja u Firefoxu^(Firefox)

1. Otvorite Firefox i upišite about:preferences u adresnu traku.

2. Kliknite karticu Privatnost i sigurnost^{(Privacy & Security )} i pomaknite se prema dolje desno okno.

3. U izborniku Sigurnost ^(Security)poništite^{(uncheck )} okvir označen s Blokiraj opasan i obmanjujući sadržaj^{(Block dangerous and deceptive content )} u odjeljku Varljiv sadržaj i opasna softverska zaštita^{(Deceptive Content and Dangerous Software Protection )} kao što je prikazano.

Provjerite jeste li ispravili pogrešku NO CYPHER OVERLAP u Firefoxu^(Firefox) .

Pročitajte također: ^{(Also Read:)} Popravite da Firefox već radi^{(Fix Firefox is Already Running)}

Metoda 11: Osvježite Firefox^{(Method 11: Refresh Firefox)}

Osvježavanjem Firefoxa^(Firefox) izbrisat će se vaša proširenja i druge prilagodbe, ali nećete izgubiti svoje oznake, preuzetu povijest, spremljene lozinke, kolačiće i podatke za automatsko popunjavanje web obrazaca. Može riješiti problem sa SSL_ERROR_NO_CYPHER_OVERLAP . ^{(SSL_ERROR_NO_CYPHER_OVERLAP)}Slijedite upute u nastavku za osvježavanje Firefoxa^(Firefox) .

1. Slijedite korake 1 i 2 iz metode 4^{( Method 4)} .

2. Kliknite na Više informacija o rješavanju problema^{(More troubleshooting information)} .

3. Odaberite opciju Osvježi Firefox....^{(Refresh Firefox… )}

4. Kliknite gumb Osvježi Firefox^{(Refresh Firefox )} i on će započeti proces osvježavanja.

5. Kliknite Završi^{(Finish )} u prozoru Čarobnjaka za uvoz.

6. Kliknite na Let’s go! dugme.

Napomena:^{(Note: )} Kada osvježite Firefox , svi prethodni podaci Firefoxa^(Firefox) pohranjuju se u mapu Old Firefox Data na vašoj radnoj površini^(Desktop) . Podatke možete koristiti kad god je potrebno ili ih možete izbrisati.

Metoda 12: Napravite novi Firefox profil^{(Method 12: Create New Firefox Profile)}

Ako se još uvijek suočavate s problemom sa SSL_ERROR_NO_CYPHER_OVERLAP Firefoxom^{(SSL_ERROR_NO_CYPHER_OVERLAP Firefox)} , kreiranje novog korisničkog profila za Firefox može ga riješiti . ^(Firefox)Da biste to učinili, slijedite dolje navedene korake.

Napomena:^{(Note: )} Izađite iz Firefoxa^(Firefox) i zatvorite sve njegove kartice prije nego što slijedite ovu metodu.

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

2. Upišite firefox.exe -P i kliknite na OK .

3. Odaberite Create Profile...  opciju kao što je prikazano.

4. Kliknite gumb  Sljedeće^{(Next )} u  prozoru Čarobnjaka za kreiranje profila .^{(Create Profile Wizard)}

5. Upišite naziv novog profila pod Unesite naziv novog profila^{(Enter new profile name)}  i kliknite na  Završi^(Finish) .

Također pročitajte: ^{(Also Read:)} Kako popraviti da Firefox ne učitava stranice^{(How to Fix Firefox Not Loading Pages)}

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

Ako vam nijedna od metoda ne radi i još uvijek se suočavate sa SSL_ERROR_NO_CYPHER_OVERLAP Firefoxom^{(SSL_ERROR_NO_CYPHER_OVERLAP Firefox)} , možete pokušati ponovno instalirati preglednik. Moglo bi učiniti trik. To možete učiniti slijedeći ove korake.

1. Pritisnite tipku Windows^{(Windows key)} , upišite Upravljačka ploča^{(Control Panel )} i kliknite Otvori^(Open) .

2. Kliknite na Deinstaliraj program^{(Uninstall a program )} u izborniku Programi^{(Programs )} kao što je prikazano.

3. Odaberite Mozilla Firefox s popisa i kliknite Deinstaliraj^{(Uninstall )} kao što je prikazano.

4. Kliknite Da^{(Yes )} na  prompt Kontrole korisničkog računa .^{(User Account Control)}

5. Kliknite  gumb Next > u   čarobnjaku za deinstalaciju Mozilla Firefoxa .^{(Mozilla Firefox Uninstall)}

6. Kliknite na  Deinstaliraj^(Uninstall) .

7. Kliknite  Završi^(Finish)  za zatvaranje prozora.

8. Pritisnite tipku  Windows^{(Windows key)} , upišite  %localappdata% i kliknite  Otvori^(Open)  da biste otišli u  AppData Local  folder.

9. Desnom tipkom miša kliknite mapu Mozilla  i odaberite ^(Mozilla )delete .

10. Ponovno pritisnite tipku  Windows^{(Windows key )} , upišite  %appdata% i kliknite  Otvori^(Open)  da biste otišli u  mapu AppData Roaming .

11. Ponovite 9. korak^{(Step 9)} za brisanje mape Mozilla .

12. Konačno,  ponovno pokrenite računalo^{(restart your PC)} .

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

14. Pokrenite Firefox Installer  iz mape Preuzimanja^(Downloads) i instalirajte preglednik na svoje računalo.

Otvorite preglednik i provjerite je li problem riješen.

Napomena:^(Note:) Ako se i dalje suočavate s pogreškom SSL_ERROR Firefoxa^{(SSL_ERROR Firefox)} , onda je problem možda na strani poslužitelja. To se događa ako web mjesto radi na šifriranom odijelu RC4 koje popularni web preglednici ne podržavaju i ako je poslužitelj postavio security.tls.unrestricted_rc4_fallback kao False u svojim postavkama. U tom slučaju možete kontaktirati vlasnika web-mjesta kako biste riješili problem, ako je potrebno^{(security.tls.unrestricted_rc4_fallback as False in their Preferences. You can contact the site owner in that case to fix the issue, if needed)} .

Preporučeno:^{(Recommended:)}

• 9 najboljih arapskih kanala na Kodiju^{(9 Best Arabic Channels on Kodi)}
• Popravite kako se Google Chrome automatski otvara u sustavu Windows 10^{(Fix Google Chrome Opens Automatically on Windows 10)}
• Popravite Firefox ne reagira^{(Fix Firefox is Not Responding)}
• Popravi pogrešku resetiranja Firefox veze^{(Fix Firefox Connection Reset Error)}

Nadamo se da je ovaj vodič bio od pomoći i da ste uspjeli popraviti pogrešku Firefox  SSL_ERROR_NO_CYPHER_OVERLAP . Javite nam koja vam je metoda najbolja. Ako imate bilo kakvih pitanja ili prijedloga, slobodno ih ostavite u odjeljku za komentare.

Fix Firefox SSL_ERROR_NO_CYPHER_OVERLAP in Windows 10

If you are a Firefox user, you might have faced SSL_ERROR_NO_CYPHER_OVERLAP error at least once. Τhis NO CYPHER OVERLAP error can be related to update issues. It stoрs web brоwsing which can be frustrating. If you are deаling with this error, yoυ are at the right place. We bring to you a perfect guide thаt will help you fіx ЅSL_ERROR Firefox browser error.

How to Fix Firefox SSL_ERROR_NO_CYPHER_OVERLAP in Windows 10

In some cases, Firefox is unable to collect security data from the requested website which primarily leads to Firefox SSL_ERROR. Here are some reasons which can cause this error:

• Miscommunication between client and server.
• Data transfer between client and server could not be verified.
• Server and browser connecting with different encryption cipher.
• Outdated browser.
• Disabled SSL3 or TLS.
• Antivirus programs are interfering with the browser.
• Presence of Malware.

After under the reasons behind SSL_ERROR_NO_CYPHER_OVERLAP error, it is time fix it. Here are some simple methods that will help you fix SSL_ERROR Firefox.

Method 1: Open Firefox in Safe Mode

Common issues in Firefox can be resolved by opening it in Safe mode. It may fix Firefox SSL_ERROR_NO_CYPHER_OVERLAP. Follow the steps below to try it.

1. Open the Run dialog box by pressing Windows + R keys together.

2. Type firefox -safe-mode in the Run dialog box and click OK.

3. Click on Open when prompted

Method 2: Remove Firefox Cache

Corrupt cache and cookies in Firefox browser may cause issues in accessing web pages which can lead to SSL_ERROR Firefox error. You can resolve this problem by deleting Firefox cache as instructed below.

1. Open a new tab in Firefox.

2. Click on three lines (Open Application Menu) as shown.

3. From the drop down list, click on Settings.

4. In the left pane, click on Privacy & Security tab.

5. Scroll down the right pane and click on Clear Data… under Cookies and Site Data section.

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

7. Click on Clear. It will clear Firefox cache.

Also Read: Fix No Sound in Firefox on Windows 10

Method 3: Turn Off Hardware Acceleration

Using Hardware Acceleration may result in graphics performance issues which can cause the discussed error in your Firefox browser. You can turn off hardware acceleration option as instructed below.

1. Follow Steps 1 to 3 from Method 2 to open Firefox Settings.

2. Click on General tab and uncheck the box marked Use recommended performance settings below Performance section as shown.

3. Uncheck the box marked Use hardware acceleration when available.

4. Exit browser. You can also press Ctrl + Shift + Q keys simultaneously to do that.

Method 4: Update Firefox Browser

Like any other program, you must periodically update Firefox browser to avoid any software errors and bugs. Updating it might resolve SSL_ERROR Firefox error. Follow the instructions below to update Firefox browser.

1. Open a new tab in Firefox and click on Menu icon.

2. Click on Help.

3. Click on About Firefox.

4A. If any updates are pending, they will start downloading automatically by default if not, follow the on-screen instructions to update Firefox. After updating is complete you will see an option Restart Firefox to Update. Click on it and Firefox will restart.

4B. If Firefox is already updated, you will get Firefox is up to date message.

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

Method 5: Update Firefox Extensions

Sometimes Outdated extensions can interfere browsing in Firefox. They can also cause this Firefox SSL_ERROR_NO_CYPHER_OVERLAP error. We advise you to update Firefox extensions as instructed below.

1. Click on Menu icon in Firefox.

2. Click on Add-ons and themes.

3. In the left pane, click on Extensions tab. After that, click on gear icon located at the right of Manage Your Extensions section.

4. Click on Check for Updates.

5A. If updates are available, follow the on-screen instructions to install them.

5B. If your extensions are already updated, you will get No updates found message as shown.

Check if it resolves the issue.

Method 6: Disable or Remove Extensions

If updating Firefox extensions did not fix the issue, then you are advised to disable them from your browser or remove them completely as instructed below.

Option 1: Disable Firefox Extensions

1. Follow Step 1 and 2 from Method 5.

2. Click on Extensions tab and turn the toggle OFF for your extensions.

Note: Here, Grammarly for Firefox is taken as an example.

Disable all extensions one by one and find out which extension is causing you the trouble. This should fix the issue.

Option 2: Remove Firefox Extensions

If you have identified the problematic extension causing SSL_ERROR_NO_CYPHER_OVERLAP error, then you are advised to remove it completely from your browser as instructed below.

1. Follow Step 1 and 2 from Method 5. Click on Extensions tab.

2. Click on three dots icon to the right of problematic extension and select Remove option from drop down list.

It will remove the extension from the browser. Check if you have fixed NO CYPHER OVERLAP error.

Method 7: Disable Antivirus Temporarily

Antivirus program in your Windows 10 PC can sometimes interfere with programs like Firefox which can result in SSL_ERROR Firefox error. You to disable your antivirus program temporarily by following our guide to Disable Antivirus Temporarily on Windows 10.

Note: Enable the Antivirus immediately after the issue is resolved.

Method 8: Run Malware Scan

Windows 10 PC has a built-in security suite to detect any virus or harmful files. You can use it to scan any threats and malicious programs contributing to SSL_ERROR_NO_CYPHER_OVERLAP error. Follow our guide on How do I Run a Virus Scan on my Computer?. After that you can follow our guide on How to Remove Malware from your PC in Windows 10 and remove malware.

Also Read: Fix Server Not Found Error in Firefox

Method 9: Reset TLS and SSL3 to Default Settings

TLS and SSL refer to Transport Layer Security and Secure Sockets Layer respectively. These are cryptographic protocols that authenticate data transfer from client to server. They secure data and are enabled by default in your browser. You can reset their settings to default values as instructed below to fix NO CYPHER OVERLAP error.

1. Open Firefox and type about:config in the address bar.

2. Click on Accept the Risk and Continue button.

3. Type tls in the Search preference name field as shown.

4. If any values are marked bold, click on Reset (arrow symbol) to change their values to default settings.

Note: The values highlighted in bold are recently changed ones. Restoring them to their default settings will fix NO CYPHER OVERLAP error.

5. Repeat the steps to reset SSL3. Type SSL3 in Search preference name field and click on Reset symbol for bold values of SSL3.

6. In the same screen, ensure that the following options are set to False.

• security.ssl3.dhe_rsa_aes_128_sha
• security.ssl3.dhe_rsa_aes_256_sha

Note: You can click on Toggle button to change status from True to False or vice versa.

Method 10: Bypass Encryption Protocols

You can reset a few advanced preferences in Firefox that might fix SSL_ERROR_NO_CYPHER_OVERLAP error. This method may cause security threats but it can be implemented when you have to bypass security preferences to browse important web pages. Follow the steps below to bypass encryption protocols in Firefox.

Option 1: Through About Config

1. Follow Steps 1- 3 from Method 9.

2. Search for the following options one by one and click on Edit button and change their value to 0.

• security.tls.version.min
• security.tls.version.fallback-limit

3. Then, click on the Save button.

Option 2: Through About Preferences

Here is another way you can bypass encryption protocols in the Firefox

1. Open Firefox and type about:preferences in the address bar.

2. Click on Privacy & Security tab and scroll down the right pane.

3. In Security menu, uncheck the box marked Block dangerous and deceptive content under Deceptive Content and Dangerous Software Protection section as shown.

Check if you have fixed NO CYPHER OVERLAP error in Firefox.

Also Read: Fix Firefox is Already Running

Method 11: Refresh Firefox

Refreshing Firefox will delete your extensions and other customizations but you will not lose your bookmarks, downloaded history, saved passwords, cookies and web form auto-fill information. It might fix SSL_ERROR_NO_CYPHER_OVERLAP issue. Follow the instructions below to refresh Firefox.

1. Follow Steps 1 and 2 from Method 4.

2. Click on More troubleshooting information.

3. Select Refresh Firefox… option.

4. Click on Refresh Firefox button and it will began the refreshing process.

5. Click on Finish in the Import Wizard window.

6. Click on Let’s go! button.

Note: When you refresh Firefox, all previous Firefox data is stored in a folder Old Firefox Data on your Desktop. You can use the data whenever needed or you can delete it.

Method 12: Create New Firefox Profile

If you are still facing SSL_ERROR_NO_CYPHER_OVERLAP Firefox issue then creating a new Firefox user profile might fix it. Follow the steps below to do so.

Note: Exit Firefox and close all its tabs before following this method.

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

2. Type firefox.exe -P and click on OK.

3. Select Create Profile… option as shown.

4. Click on Next button in Create Profile Wizard window.

5. Type new profile name under Enter new profile name and click on Finish.

Also Read: How to Fix Firefox Not Loading Pages

Method 13: Reinstall Firefox

If none of the methods works for you and you are still facing SSL_ERROR_NO_CYPHER_OVERLAP Firefox then you can try reinstalling the browser. It might do the trick. You can do that by following these steps.

1. Press Windows key, type Control Panel and click on Open.

2. Click on Uninstall a program under Programs menu as shown.

3. Select Mozilla Firefox from the list and click on Uninstall as shown.

4. Click on Yes on User Account Control prompt.

5. Click on Next > button in Mozilla Firefox Uninstall wizard.

6. Click on Uninstall.

7. Click Finish to close the window.

8. Press Windows key, type %localappdata% and click on Open to go to AppData Local folder.

9. Right-click on Mozilla folder and select delete.

10. Press Windows key again, type %appdata% and click on Open to go to AppData Roaming folder.

11. Repeat Step 9 to delete the Mozilla folder.

12. Finally, restart your PC.

13. Download Mozilla Firefox from the official website.

14. Run Firefox Installer from Downloads folder and install the browser on your computer.

Open the browser and check if the issue is resolved.

Note: If you still face SSL_ERROR Firefox error then the issue may be in the server side. It occurs if a site is running on cipher suit RC4 which is not supported by popular web browsers and if the server has set security.tls.unrestricted_rc4_fallback as False in their Preferences. You can contact the site owner in that case to fix the issue, if needed.

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We hope that this guide was helpful and you were able to fix the Firefox SSL_ERROR_NO_CYPHER_OVERLAP error. Let us know which method worked for you the best. If you have any queries or suggestions then feel free to drop them in the comments section.

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