Ret Firefox SSL_ERROR_NO_CYPHER_OVERLAP i Windows 10

If you are a Firefox user, you might have faced SSL_ERROR_NO_CYPHER_OVERLAP error at least once. This NO CYPHER OVERLAP error can be related to update issues. It stops web browsing which can be frustrating. If you are dealing with this error, you are at the right place. We bring to you a perfect guide that will help you fix SSL_ERROR Firefox browser PR END OF FILE 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:

• fejlkommunikation between client and server.
• Data transfer between client and server could not be verificeres.
• Server and browser connecting with different encryption cipher.
• Forældet browser.
• handicappet SSL3 or TLS.
• Antivirus programs are at blande sig med browseren.
• Tilstedeværelse af 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. Åbn Kør dialogboksen ved at trykke på Windows + R-taster sammen.

2. Type firefox -sikker tilstand i Kør dialogboksen, og klik OK.

3. Klik på Åbne når du bliver bedt om det

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. Klik på tre linjer (Åbn programmenuen) som vist.

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

4. Klik på i venstre rude Privatliv og sikkerhed fane.

5. Scroll down the right pane and click on Slet data… under Cookies og webstedsdata sektion.

6. Fravælg boksen markeret Cookies og webstedsdata , Check (Skak) boksen markeret Bufret webindhold.

7. Klik på Klar. It will clear Firefox cache.

Læs også: Ret ingen lyd i Firefox på Windows 10

Metode 3: Slå hardwareacceleration fra

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. Følge efter Trin 1 til 3 fra Metode 2 at åbne Firefox-indstillinger.

2. Klik på Generelt fanebladet og fjerne markeringen boksen markeret Brug anbefalede præstationsindstillinger jf. nedenstående Performance (Præstation) afsnit som vist.

3. Fravælg boksen markeret Brug hardware acceleration, når det er tilgængeligt.

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

Metode 4: Opdater 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 og klik på Menu .

2. Klik på Hjælp.

3. Klik på Om 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 er opdateret besked.

Læs også: Ret din forbindelse er ikke sikker fejl på 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. Klik på Menu icon in Firefox.

2. Klik på Tilføjelser og temaer.

3. Klik på i venstre rude Udvidelser tab. After that, click on tandhjulsikon located at the right of Administrer dine udvidelser sektion.

4. Klik på Søg efter opdateringer.

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.

Tjek, om det løser problemet.

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. Klik på Udvidelser fanen og drej kontakten OFF for your extensions.

Bemærk: Her, Grammarly til Firefox tages som eksempel.

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 Udvidelser fane.

2. Klik på tre prikker ikon to the right of problematic extension and select Fjern option from drop down list.

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

Metode 7: Deaktiver antivirus midlertidigt

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.

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

Metode 8: Kør 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.

Læs også: Ret server ikke fundet fejl i Firefox

Method 9: Reset TLS and SSL3 to Default Settings

TLS and SSL refer to Transport Layer Security , 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. Åbent Firefox og type about: config i adresselinjen.

2. Klik på Accepter risikoen og fortsæt .

3. Type tls i Søgepræferencenavn field as shown.

4. If any values are marked fremhævet, Klik på Nulstil (arrow symbol) to change their values to default settings.

Bemærk: 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 Søgepræferencenavn felt og klik på Nulstil symbol for bold values of SSL3.

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

• sikkerhed.ssl3.dhe_rsa_aes_128_sha
• sikkerhed.ssl3.dhe_rsa_aes_256_sha

Bemærk: Du kan klikke på Skift button to change status from Sand til False eller omvendt.

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 Redigere button and change their value to 0.

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

3. Klik derefter på Gem .

Option 2: Through About Preferences

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

1. Åbn Firefox og skriv om: præferencer i adresselinjen.

2. Klik på Privatliv og sikkerhed tab and scroll down the right pane.

3. i Sikkerhed menuen fjerne markeringen boksen markeret Bloker farligt og vildledende indhold under Deceptive Content and Dangerous Software Protection afsnit som vist.

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

Læs også: Fix Firefox kører allerede

Metode 11: Opdater 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. Følg trin 1 og 2 fra Metode 4.

2. Klik på Flere oplysninger om fejlfinding.

3. Vælg Opdater Firefox ... valgmulighed.

4. Klik på Opdater Firefox button and it will began the refreshing process.

5. Klik på Finish in the Import Wizard window.

6. Klik på Lad os gå! .

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

Metode 12: Opret ny Firefox-profil

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.

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

1. Hit på Windows + R-taster sammen for at åbne Kør dialog boks.

2. Type firefox.exe -p og klik på OK.

3. Vælg Create Profile… mulighed som vist.

4. Klik på Næste knap ind Opret profilguide vindue.

5. Type new profile name under Indtast nyt profilnavn og klik på Finish.

Læs også: Sådan rettes Firefox, der ikke indlæser sider

Metode 13: Geninstaller 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. Trykke Windows-tastenSkriv kontrol panel og klik på Åbne.

2. Klik på Afinstallere softwaren under Programmer menuen som vist.

3. Vælg Mozilla Firefox fra listen og klik på Afinstaller som vist.

4. Klik på Ja on User Account Control hurtig.

5. Klik på Næste> knap ind Afinstaller Mozilla Firefox guiden.

6. Klik på Afinstaller.

7. klik Finish for at lukke vinduet.

8. Trykke Windows-tastenSkriv % Localappdata% og klik på Åbne at tage til Lokale AppData mappe.

9. Højreklik on Mozilla mappe og vælg slette.

10. Trykke Windows-tasten igen, skriv % AppData% og klik på Åbne at tage til AppData-roaming mappe.

11. Gentag Trin 9 for at slette Mozilla mappe.

12. Endelig genstart din pc.

13. Hent Mozilla Firefox fra officiel hjemmeside.

14. Kør Firefox installationsprogram fra Downloads mappe og installer browseren på din computer.

Open the browser and check if the issue is resolved.

Bemærk: 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.

Anbefalet:

We hope that this guide was helpful and you were able to fix the Firefox SSL_ERROR_NO_CYPHER_OVERLAP fejl. Fortæl os, hvilken metode der virkede bedst for dig. Hvis du har spørgsmål eller forslag, er du velkommen til at skrive dem i kommentarfeltet.