Firefox Community Forum

I know, sounds stupid, but it is what it is. It happens rarely, only with Firefox on the secondary display from my laptop, via HDMI. It starts with some random few thin horizontal bars across the window itself, and soon, it turns off my display. It seems the bigger the window is, the more severe the issues. So full screen usually, it shuts it off and keeps it off. Not black screen, no signal style. I manage to get it out by Winkey+arrow. If i then put it back same issue. If i lower the width of it, it manages to stay coherent longer, but still resets the display with a quick black screen on page reload. The lower bounds on a 1920x1080 display resolution was 1515 pixels. At 1515 pixels, it works fine, once this is triggered, it's very repeatable on 60-70% of webpages. If i drag another window on top of Firefox, the monitor comes back up.

Before anyone asks: I have tried turning off hardware acceleration. I have tried putting firefox.exe to run on the integrated video card and on the dedicated 1060 Max Q videocard. I have cleared cache and etc.

This persists on a Windows session, across multiple Firefox restarts. A computer restart technically fixes it but i have no clue what triggers it. Laptop monitor works fine.

Hello!

I have Firefox in all my units and it has worked very well over the years. Until I activated Avast SecureLine VPN on my computer HP Microsoft 11.

When the computer is connected to wifi/internet and VPN is activated, the Firefoxprogram won´t start correct. It says I am offline. If I then turn VPN of and update the page it will work immediately. As soon the page start the update I can turn VPN on and it will work on every link and page.

What can I do to get rid of this problem?

/Mattias Forsberg

Hello,

I checked the troubleshoot and gave all the necesarry permissions on my Mac for Google Meet to use my screen (allowed audio, video and screen recording). Nevertheless, I cannot manage to share my screen on Google Meet. As shown in the screenshot, it offers the option to share my whole screen (I cannot select a window or a tab...) but for my audience neither this is working.

Could you please help me fix this?

Many thanks in advance!

In daily work tasks, I end up with a large number of windows and tabs open. I am wondering if this is not adding to my extremely slow recovery of frozen tabs and windows and MANY instances of "Non-Responsive" everyday. Firefox is set to allow multiple processes, naturally, but I'm looking for ways to ease the pain here. If I disable Multiple Processes in Firefox v138.0.1, will I have problems running, for example, 5 windows with a total of 30 tabs spread across those Windows? (God knows I don't wanna have to grow up and actually manage the things I open up for stuff.) In addition, I am running Canva, sometimes Paint 3D, and Office 2021 concurrently. An associated question........in this most recent Firefox, how do I run Multiple processes, but limit the number of them to 5, for example? There used to be a setting in Firefox to do that, but I can't find it. I'm working with Windows 11-v24H2 on a Dell Inspiron 17 with an Intel Core i7-8550U CPU (about 7 years old) and 16Gb of Ram.........and sometimes I fall asleep waiting for many tabs, windows, and instances of Office 2021 to come back to work (I'm thinking they signed a Union deal, and didn't tell me about it.).

This has been going on and getting progressively worse for about 3-4 months.

Advice? Suggestions? I'd be truly grateful for any ideas you got.

I’ve noticed that Firefox consumes a lot of memory, especially when I have multiple tabs open. Sometimes, it slows down my entire system, and Task Manager shows Firefox using over 1GB of RAM even with just a few tabs. Other browsers like Chrome or Edge seem to handle memory better with the same number of tabs.

I’ve tried restarting Firefox, closing unused tabs, and disabling a few extensions, but the problem keeps coming back. I even checked techsquest.com for tips, but I’m still struggling. Are there specific settings, hidden features, or optimizations I can apply to reduce Firefox’s memory usage without sacrificing performance?

Here’s what I’ve already checked:

Firefox is updated to the latest version.

No unusual extensions running (just uBlock Origin and Dark Reader).

Hardware acceleration is enabled.

Any help would be appreciated—thanks in advance!

The middle mouse button press has no response.,Can't scroll the screen.,Other functions of the mouse are normal.,In other browsers, the middle mouse button is all normal.,What is the reason for this? Windows 11 brand new, new installation of Firefox.

All my other browsers work fine but since April 4, 2025 Firefox won’t work at all. Websites won’t load. I have tried to clear my cache & cookies, I have checked my connection settings, I have checked for malware, I have turned off all my extensions and I have completely restarted my computer several times now, nothing has worked. I also did trouble shoot mode & reinstalled Firefox (though I will admit I maybe didn’t do this step properly). I refreshed Firefox. Why is it not working? What happened? I don’t know what to do as I don’t want to lose all my bookmarks and passwords that I have yet to move over to my password manager. Please help.

I did not set a primary password but they I'm constantly asked to enter it? I can't reset it because it'd delete all the saved passwords which I want to view. Is there a default primary password?

Hi all,

I’ve been using Firefox for a while now, but coming from Chrome, I’m finding some aspects of Firefox’s cache management and tab behavior a bit inconvenient, and I wanted to share my thoughts.

The issue:

When I restart Firefox (version 133.0.3-1), it loads webpages from the disk cache, which is fine because I’ve set browser.cache.disk.enable to true and browser.cache.check_doc_frequency to 2, it will always make a request to the server on restarting Firefox with the default value of 3. However, the problem arises when I open new tabs — they also load from the disk cache instead of requesting fresh content from the server.

What I’m looking for:

   A way to have Firefox:

Load webpages from the disk cache when restarting the browser (which I want, and I have set browser.cache.disk.enable to true for this). But always make fresh requests from the server when opening new tabs, no matter what the cache settings are.

In Chrome, this behavior is more intuitive — it loads from the cache after restart but always fetches from the server for new tabs, which I find to be much more reasonable.

I understand that about:config provides settings like browser.sessionstore.restore_on_demand, but adjusting this option makes Firefox fetch content from the server for all tabs, including those opened after a restart. This doesn’t seem like a perfect solution because it takes away the ability to use the disk cache after restarting the browser.

I would really appreciate it if Firefox could offer more granular control over this behavior, so users could get the benefits of both caching and real-time requests based on the type of tab (restart vs. new tab).

Thanks for your attention, and I hope to see some improvements in future updates!

All of a sudden, I get a "Not enough room to save" error message when I try to download a fill. There is plenty of room on my disk.

Also, it's not giving me the option of just opening the file.

I've been needing to use Edge to download files.