Firefox Community Forum

I am trying to switch back to Firefox after having used it once before. However, I am unable to use the browser at all. I have to run it with administrator permissions for it to even open, and when it does open, I am met with a completely blank grey screen with nothing but my bookmarks. I cannot click any bookmarks, nor can I click anything on the sidebar [passwords, account, etc.] I can't search anything, and I can't use direct links.

I have uninstalled four times using Revo Uninstaller, removed all lingering data all four times, refreshed the browser, refreshed my account, changed my account password, run troubleshooting mode, updated my computer, updated my drivers, and updated the app. Absolutely nothing has worked, and I am still unable to use it.

I'm not sure what else I can do.

Firefox is creating very high CPU use with many WebThumbnailExtension Web Connect processes. The processes disappear after shutting down Firefox and other programs that access the internet. Does anyone have an answer on how to prevent this from happening?

MacBook Pro M4 with MacOS Sequoia 15.3.1

Firefox and Chrome

When I search for businesses and then want to see the phone number I have to click a ‘call’ button and that takes me to a pop up message (see attached)

With the question: ‘Allow this site to open the tel link with Firefox?’

But when I click open link it doesn’t work. So I cannot look up the business phone numbers! This only happens on Firefox and Chrome. On Safari the phone numbers show without the call button.

My main browser is Firefox.

Please help! Thank you.

I keeep a file on my system which is essentially an annotated list of links to useful references. Since upgrading to Firefox 135.0, I can no longer open links to these references if they are local documents (links to websites work fine). Attempting to open a local document (usually an .odt file) brings up a window describing the file and offering tp save it, or open it with the system handler. Opening with the system handler produces an error message "unknown error" and suggests trying saving to disk first. Clearly Firefox does not know how to deal with .odt files, and I can find no way of telling it.

If I get to Settings - General - Files and Appications and scroll down the Applications window to ODT document, I find it set to "Always Ask". I can change this to "Save File", "Use System Handler (default) or "Other". "Save File" is not what I am trying to do, and the other two options produce the same result as "Always Ask". There seems to be no way of telling Firefox to open .odt files with Writer (or anything else for that matter.) The support page (https://support.mozilla.org/en-US/kb/change-firefox-behavior-when-open-file) suggests that I should have a further option "Use<application name>". But it just does not appear. Anyone any ideas?

I've been a Firefox user since the beginning, but every few years I leave the browser because it becomes unusable. I am at one of those inflection points now.

During the past few weeks, I've run into web pages that simply will not work in Firefox. I have not tracked all of the URLs, but can tell you they include navigation of Tax1099 (a website used to send tax documents) and AT&T, where I could not access their Premier shopping page. These pages load easily in Chrome and Edge.

Yes, I've tried standard troubleshooting, including disabling my longstanding extensions and all suggestions in this article (http://mzl.la/1xKrMnN).

I simply do not have time to troubleshoot this every day, every time I need something in timely fashion. It is a huge time suck. Firefox has -- again -- become an impediment to my work flow and it seems time to leave it, again.

I;m not asking for help; this is simply a fact. And Mozilla should consider it a reason why Firefox has lost popularity. Most people will simply move on, and not do any troubleshooting, take the time to search for solution or write to this board. In the past, I've been told that this is MY problem with MY systems (because this happens on two different computers). Whether or not that's true, it doesn't change the fact that other browsers do not have this problem. Ever, in my experience.

after downloading latest Firefox, suddenly seeing a looooooooong list of commands which were not there earlier.(see on the right). all these additions are not described in the changes summary! further, the command "Take screenshot" does not work. the earlier extension for screenshots which i had is also not to be seen. so added moravi screenshot but unable to take any screenshot, full or part.

Hello Firefox Team,

I’m writing to report an issue I’ve encountered with Firefox on my Mac M2. When I double-click the window’s title bar, the window does not maximize or “fill” the screen as expected. In contrast, other applications (such as Chrome) correctly respond to this action based on the macOS setting ("Double-click a window's title bar to: zoom").

Here are a few details that might help in diagnosing the issue:

   Troubleshooting Attempted:
       I verified the system setting under System Preferences → Dock & Menu Bar is set to “zoom”.

I’m wondering if this behavior is expected with the current Firefox design on macOS, or if it might be a bug. Any insights or suggestions you might have would be greatly appreciated.

Thank you for your time and assistance.

Best regards,

I've been an evangelical Firefox user for over 20 years now, and rarely have any problems. However... every day, I read The Times online (my mother gets a free digital subscription with her paper version), and they've recently changed their site radically.

So it's probably not a FF problem, but The Times people aren't helpful.

Anyway, as I scroll down the index page, I usually <CTRL> click on potentially interesting articles, to open them in separate tabs. When I have a few open, I go through them and read each one in turn.

With the new Times version, when I do this, the index page also changes to the one I've selected for the new tab, which is annoying. I asked their support people about it, but their reply was that <CTRL> click "isn't supported".

Obviously this is disappointing, as it's how I've always done things, and it still works on every other website I visit!

Can anything be done in FF to make it work?

Thanks :-D

FF 135.01, 64 bit Windows 24H2, build 26100.3194

Hi, for the past couple of weeks firefox is causing the GPU to block firefox when trying to play a youtube short preview by hovering over the short. The screen goes white and then returns and it happens again if you leave the cursor over the short. After a few of these, the message comes up that the GPU (nvidia in this case) acceleration has blocked access to firefox. This will happen every time. The issue doesn't occur in chrome. The issue doesn't occur if firefox is started in troubleshoot mode. If I run in regular mode and manually disable my one extension (keeper) and the two plugins - widevine codec and cisco openh264 codec, the issue will still occur. I have no other add-ins. I have updated firefox and the nvidia drivers to the most current. The gpu is nvidia geforce 940mx with intel hd graphics 620. I am running 64bit windows 10 home on an hp envy laptop with i7 chip. Any ideas? Thanks.

Hi, in windows 10, while I am launching Firefox - if it does not exist yet - a new read-only file is created on the Desktop. This file was created time ago by myself (so its name does not matter much and it contains only a small empty branch). I can't delete it as far as I don't have the rights to do it. I tryied used cmd console and powershell to fix it, but nothing works fine. I run my antivirus, no more result. Tried to trash this file using external programs, same issue. Tryied to change the rights of that file, to reinstall completly FF, nothing seems to be useful. Possible way to solve it : I clean up my C: last week because I wanted more space and a better organization (moment from which that problem began). It is like Firefox was needing a file in the Windows tree and as he couldn't find it, he creates it because he need that this file exists. Regards

The past weeks/months I do not see any square check boxes where they are supposed to be. When I click in the space where I know ther is supposed to be one, a check mark does appear, but it is annoying. Buttons remain empty visibly when I check it. No dot appears, but it does register that I clicked it. Also annoying. It's in automatic, light and dark mode the same

P.S. The same with the check box (email me) on this page, but now I see a check box but not if I clicked it.

About once a minute or more Firefox lag by 10-15 seconds before showing a character or characters I have typed.

It seems to be using a lot RAM. I have one window open with six tabs, including this one, and it is using nearly 8GB. There are 48 processes showing in Activity monitor.

I am using version 135 on a Mac Book Pro running MacOS 15.3 (Sequoia).

It is almost unusable.

I am on a Mac desktop running Ventura 13.7.3 and running Firefox 135 with extension of Ghostery, Privacy Badger, Google Don't Track Me, Facebook Container, FoxClocks and SoftGreenLeaves theme. All of these extensions have been playing nicely with each other for a long time.

Recently I've been having trouble recently with Firefox doing that thing of suddenly freezing/producing multiple windows and I need to refresh in order to get it working properly again. This has happened three times in the last five days - so frequently that I now keep the refresh instructions on my desktop. Today I heard the CPU grinding and clicked open my Activity Monitor to see four listings of 'FirefoxCP Isolated Web Content' running all of them using in excess of 2Gb. Unfortunately I wasn't able to get a screenshot of the Activity Monitor while this was going on as I had the Mac force quite Firefox and the moment I did, the activity stopped, but I've attached an example of the Activity Monitor showing still high CPU values for a few moments of browsing.

So what's up? How can I stop the CPU grab? How can I stop the frequent crashing?

There is a similar (but not identical) topic on Mozilla Connect , and I posted there. But I did not get a response. So I am re-posting on this new topic on Mozilla Support. I have a similar problem to what was discussed on Connect. I am using Firefox 133.0.3 on Windows 10 Professional. After Firefox has been running for a while, I get a message from Windows 10 that the free space on my C:drive is low. I did a directory listing on my C-drive before and after Exiting Firefox; I saw no large files disappearing. Then I decided to do "dir c:\ /ah" to see hidden files. What I saw was that pagefile.sys decreased in size from 29,925,748,736 to 16,270,770,176. This was a decrease of 13.7 Gb. Is this normal? I have lots of windows and tabs open in Firefox. Thanks.