Firefox Support Forum

The Firefox prefs.js file was quarantined by avast yesterday. Message indicated malware had infected the file. Now when I click on the Firefox icon the MSN browser comes up. How can I get back to using Firefox safely? Can I uninstall Firefox, then re-install it to make the problem go away?

I have an Airris modem router combo that is locked out for to many attempts. I have done a reset and it still wont unlock. I had the same problem wit a bank lockout on your website and i got out of it by accident when I found a security site on fire fox an it was in Preferences and it was listed as do not allow and allow, clicked on allow and that whole mes cleared instantly. did I write this down, no I will remember it SURE . cold you please tell me where it is

Is there any to make Firefox automatically restart a new session (loading the start page) after a crash, without any prompts?

Context: This is for a disabled person who cannot use input devices: I start her computer every morning before going to work and load a long Youtube playlist of videos, so she doesn't have to do anything. But if Firefox crashes 5 minutes after I left, she cannot restart anything herself and has to wait until I come back.

Any ideas?

Hi.

Using Windows 10. Suddenly, Mozilla gives the "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window" message. I've tried all steps listed on the help site except reinstalling Windows 10, as the comment made said this would require reinstalling programs that did not come pre-installed on my PC, which I don't want to do if possible. I have uninstalled Mozilla, and the install stalls at about 70% with the aforementioned error message. Any help would be greatly appreciated! Thanks.

I have this box that shows up over the top of any video application on my firefox browser since my most recent update. It doesn't appear on other browsers. How can I remove it?

Hello,

I have been using Firefox for something specific for a long time now. I've noticed in a recent update having the ability to do what I need has ceased. If a Firefox window is covering another (or covered by another program) on the screen, the graphics of the background Firefox window no longer update. I run a software that needs to see these graphics in order to function properly.

Could you tell me which version this stopped working and if there are plans to reverse whatever change you made?

Thanks, Kyle

~~~SOLVED~~~ Hello guys, this is about some..adults sites, i'm just getting loading error on the screen. Sorry if that's inappropriate. Also recently, youtube videos can't play at 1080p, only 720p, even tho i know the video it's 1080p.

When I do a search using google, and then click on a choice (one of the first sites listed) my browser tries to go to something called "googleadservices" and it will not load. Just hangs up and gives me a blank page. How do I stop this or remove googleadservices?

I use two displays, suddenly it is no more possible to move the Firefox- and/or Thunderbird-Windows from Monitor to the other monitor, grabbing its mainbar and trying to move, the window sticks on half way and then flops back.

I am able to install Firefox, but as soon as I try to open it, after a second a window pops up for probably about 1 frame, and is barely visible. I have tried all of the things I could, but am not able to fix this.

Image url has jpg at the end, when I save, the extension is webp. webp opens as darkened version of the original image in browser. How to disable webp and save normal fiel that won't be dark? This olution doesn't work: https://support.mozilla.org/en-US/questions/1329624 Image saved as jpg still dark, as if it was still webp.

Hello, i facing the problem that firefox goes to infinite update that never end. This consumes my CPU a lot higher that usual (even often reach 100%). I'm tired of this problem that i many time reinstall and refresh(reset) the firefox

Error message when accessing business websites which use Cloudflare: "ERROR 1005 ACCESS DENIED DUE TO ASN 9009". This seems to be because Firefox is using ip addresses which are blacklisted. This has been checked with blacklist services such as DroneBL. I am not using a VPN. I constantly clear cache & cookies from Firefox and then restart the computer. I am not ignorant or stupid. Why is Firefox using blacklisted ip addresses? Is it because of M247? Is there any way around this extremely annoying problem? Thank you for your response.

FireFox Developer 99.0b8 (64-bit) on the "aurora update channel" on Windows 10 PC (version 1803, build 17134.2208)

I notice whenever an update is pending (the green dot appears in the icon for the "Open Application Menu"), FF becomes unresponsive in a way. When it happens: It does not totally freeze. I can select/switch between existing tabs & scroll thru their pages. I can close tabs. I can open a new empty tab. But I can't load or refresh any pages. The only fix is to do the update, and re-launch.

Since the developer edition gets updated frequently, it is a pain.

I like the Developer Tools! But... How can I scale back the FF "update frequency", or "change the channel", so updates are, like monthly at most?

thank you.

I saw this post https://bugzilla.mozilla.org/show_bug.cgi?id=542690 where it seems implied that it should work, but on LMDE 5 w. firefox 98.0.2 64-bit scrolling horizontally w. touchpad doesn't work for scrolling on pages nor for scrolling the tab list at the top.

I recently upgraded graphics cards from an Nvidia GTX 1080 to an AMD 6900XT. Since then I noticed video stuttering on YouTube while playing 4k videos, especially noticeable at 4k/60FPS (example video ). Prior to the upgrade, I was not experiencing issues.

I monitored task manager as the video was playing to see CPU usage, which was sitting at 25% (4 core 8 thread CPU). GPU usage was fluctuating from 1-3%.

I tried resetting all the changed configuration options in about:config, removing all add-ons, "Refreshing" Firefox, and ultimately uninstalling and reinstalling. Nothing has worked so far except for "Troubleshooting mode" in about:support. In that mode, I experience no stuttering and GPU usage rises to 25-35% with the video playing, even before I reinstalled.

This most likely isn't a networking issue as the "Stats for nerds" option on the YouTube video shows I have 10-20s of buffer while the video is still stuttering.

I would like to find out what's different about Troubleshooting Mode that is not giving me the same problem while in "Normal Mode". Any advice?

Whenever I try to sign into Outlook Webmail (https://outlook.office.com/), Firefox crashes. I am on a MacOS Monteray (12.2.1). I have cleared all Firefox caches and cookies. I have completely uninstalled and re-installed Firefox. I have run it with my usual extensions, and completely clean, without any extensions and just the default settings.

The initial login page loads fine, and I type in the email address associated with the account. This takes me to the password page. If I type in an incorrect password, the site tells me so immediately. If I type the correct password, Firefox crashes--I get the spinning beachball cursor and (application not responding) in the dock. My only recourse is to force-quit Firefox.

Outlook webmail used to work fine in Firefox--I used it on this very machine nearly every day. The only change was that I recently had to update my email password. But again, I have had to do that every three months for years and have never had any problems.

Outlook webmail works just fine on this machine in Safari and Chrome. It's only Firefox that has any problems with it.

Any ideas about how to fix this would be greatly appreciated.

I can't play a video when logged into a website - see https://support.mozilla.org/en-US/questions/1371380

I'm sure it is not Firefox as I have also tried Chrome and Opera; same problem. How can I debug this and find out why the video cannot be played ?

I see there is 'Remote Debugging' and 'Browser Console' under 'More Tools'. How do I use these or other tools to find out what is causing the problem please ?