Firefox Support Forum

I've run into a strange issue lately - certain sites are left unable to sign in. I've tried disabling add-ons, clearing cache, cookies, history, lowering my security settings, adding site exclusions, disabling VPN, refreshing firefox, uninstall/reinstall, uninstall/clear data/reinstall/refresh firefox, everything. Still, nothing.

One site in particular is Dropbox. I enter my creds, it asks for my authenticator, error. So I tried in another browser and it works fine. So it's definitely a firefox issue.

I did disable my authenticator temporarily, and was able to sign in on Firefox. However the moment I re-enabled it, I'm no longer able to sign in again.

I have a few other sites that won't sign in either. Some give errors, some accept my password then refresh to the non-signed in page.

I'm at a loss. I've tried everything I can think of. And confirmed all sites work in other browsers.

OS: Windows 10 OS Version: 1909 Firefox: 78.0

Pretty much like the title says, FF 78 shows me a solid black, instead of slight translucent, tab bar (background), when I changed to light theme it stayed black too.

Any way to solve this?

Please HELP! I have Google as my search engine. When ever I type something in, Yahoo gives me the results! Their in NOTHING in my programs that show Yahoo

Thank you

Kurt

Just updated to version 78.0.1 (64-bit) on Windows 10 and now my tabs will NOT load/hanging, even after several restarts. PLEASE FIX THIS ASAP, I have work to do!!!

Firefox upgraded to 78.0.1 but my extensions are now inaccessible/invisible. They show as enabled in the about:add-ons tab but no longer appear at the top of the main window - so I casn no longer access them.

Firefox 78 sometimes fails to block autoplay, e.g. scrolling the front page of reddit.com or a subreddit will intermittently show videos playing.

This worked in 77. Some about:config entries I'd swear were set in 77 have vanished; I tried adding them manually, but the autoplay blocking is still hit and miss.

Also, not sure if Troubleshooting Information uploaded successfully or the page broke (see screenshot).

today firefox updated to version 78.0.1 (x64), on Windows 10 build 19041. all of my browsing history was deleted and firefox will no longer save any history

Why when i update to firefox 78.0.1 DOESN'T let me to download anything at c:???

The previews version 77.0.1 i can download at c: normally.

Now i can't.

WHY????

Hi everyone,

I have been having some problems with the log in button on several websites, with some websites not loading after I click 'log in'. I tried disabling add-ons on Firefox and going into 'Safe Mode', but it doesn't seem to work. Can you help me please?

Thank you.

I noticed that recently, several of my machines (all logged into the same FF account) are experiencing pretty extreme performance penalties, and when on battery, the battery drains very quickly. Within the Windows Task Manager, I see that FF is often taking up 50%+ CPU even though I'm using fewer tabs than usual. Within `about:performance`, I see that Multi-Account Containers is the resource hog.

On another machine where I am not logged in, FF performance is pretty good. On the affected machines, Edge runs very fast with low CPU/memory use, so there's definitely an issue with FF on these machines.

About:config shows that extensions.experiments.enabled=false, and the Containers plugin hasn't been updated in 2.5 months.

I would prefer to not uninstall containers since they're so useful. I could clobber and reinstall them for testing, but is there a known issue or a quick fix for this?

[Locked as a duplicate of https://support.mozilla.org/en-US/questions/1293313. Please follow up there, thanks.]

so i installed the transgender theme and now i cannot start roblox and i even deleted the theme and set my old theme back and it still doesnt work, btw why does a fricking theme even break my whole browser

I get the following error when I log to my WebMail account on COX.NET using the Firefox browser under Windows 10: "There was an unexpected internal error. Please try again."

I do not get the error when I use Microsoft Edge.

I have tried refreshing Firefox with the add-ons disabled but the error persists.

I am facing two issues with Firefox. I am using Firefox on Macbook Pro 2017 with i7 processor and 16GB Ram, but after importing all my bookmarks from chrome its laggy like when i move mouse hover the bookmarks its animation response time is slow ie :- Moving cursor up and down the blue animation strip its bit delay comparatively mouse cursor movement.

Secondly i am having issue with YouTube, when i am double click on YouTube video to full-screen its give blank screen for a sec its bit annoying i think it need to fix.