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Can't login to router web interface anymore (Authentication Required fails)

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FunKing
FunKing
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After upgrading to Firefox 9.0.1 (or another recent version), I can't login to the web interface of my router anymore, even though I can login with other browsers.

I've tried to login to 192.168.1.1 using Firefox 9.0.1 and my saved credentials (admin/********), but the authentication pop-up just showed up again. The same thing happened when I manually entered the same information. Using safe mode and/or private browsing didn't help either.

To be sure that is was a problem with the Firefox browser, I wrote the address, login and password in a text file, then copied-&-pasted the information into both Firefox and Google Chrome. The result: after repeating this a couple of times, it always worked on Chrome and never on Firefox.

The login process used to work flawlessly with previous versions of the browser, but I'm not sure if the problem appeared on 9.0.1 or the version before.

After upgrading to Firefox 9.0.1 (or another recent version), I can't login to the web interface of my router anymore, even though I can login with other browsers. I've tried to login to 192.168.1.1 using Firefox 9.0.1 and my saved credentials (admin/********), but the authentication pop-up just showed up again. The same thing happened when I manually entered the same information. Using safe mode and/or private browsing didn't help either. To be sure that is was a problem with the Firefox browser, I wrote the address, login and password in a text file, then copied-&-pasted the information into both Firefox and Google Chrome. The result: after repeating this a couple of times, it always worked on Chrome and never on Firefox. The login process used to work flawlessly with previous versions of the browser, but I'm not sure if the problem appeared on 9.0.1 or the version before.

Moambuepyre FunKing rupive

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cor-el
cor-el
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Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

Create a new profile as a test to check if your current profile is causing the problems.

See "Basic Troubleshooting: Make a new profile":

There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.

If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.

See: