Firefox Community Forum

Please remove and do not add any AI/ML features to Firefox, it's the only mainstream browser of this kind left, i was planning on buying some merch but I don't think this company deserves my money if it tries to make cash off me in an insidious way either way

suse linux 15.6 firefox 140.9.0esr (64-bit)

An aggressive website can cause "isolated web co" processes to be started. When they hog all processors and memory, the computer besomes unresponsive. Keyboard and mouse freezes up.

Is there a way to limit firefox processes to n-1 processors, leaving 1 processor available for me to kill it ?

I have a Ruby on Rails app and whenever I click on a button in it that submits a POST request, instead of redirecting back, it sends me to a GET of the POST request. For example I am at /a, I make a POST request to /a/b, instead of redirecting back to /a, it sends me to /a/b which returns a 404 as there is only a POST defined at this route. I have tested this same site in Chromium and the redirects work properly, returning me back to /a

I have vertical tabs enabled and the "expand when hovering mouse" option is activated (see screenshot). However, the latter functionality tends to glitch at some point in basically every session. I can't tell if a specific action triggers it, so far it seems pretty random. The glitch is that either the tabs are expanded and won't collapse, or the opposite: they're collapsed and refuse to expand when I point at them. Is this feature maybe still experimental? or something? I'm running Firefox 149.0b5 DEveloper Edition on Garuda Linux (Arch based).

Please sell me uncapped access with built-in VPN. Let me pay for this. I am not interested in the existing "Mozilla VPN" service because it requires an external application outside of the browser, which is not always compatible with systems mozilla is deployed to.

how to see how many time and when I visited a website in firefox. like I visited "https://www.themoviedb.org/person/500-tom-cruise" 10 times. now it only show latest time not the first or secnd or third in firefox. how to see?

I had an issue where my browser disappeared. Here are specifics for my installation.

Name Firefox Version 142.0.1 Build ID 20250827004350 Distribution ID raspberrypios User Agent Mozilla/5.0 (X11; Linux x86_64; rv:142.0) Gecko/20100101 Firefox/142.0 OS Linux 6.12.62+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.12.62-1+rpt1~bookworm (2026-01-19)

I relaunched and then restored previous session. After that, I searched open tabs, but when I selected a tab that was reported to be opened,  it was not restored. I went to troubleshooting mode and it worked fine suggesting some issue with an extension.  What, if any logs could I capture to help debug? thanks

I have Firefox 149 and the new Firefox VPN feature appeared with a VPN toolbar button.

I try keeping a very minimalist toolbar, but if I remove the VPN button from the toolbar, then I could not find any menu or setting item to switch the VPN on/off. The VPN section in the Settings only allows feature configuration but not switching the VPN on/off.

Do I miss something obvious, or did the Firefox developer miss something obvious?

I just wanted to say thank you so much for adding the new Firefox VPN toggle. I used to use the google one VPN before they shut it down, and some websites I browse have region specific things I can't use in the US.

Please keep supporting and implementing the Firefox VPN, it greatly improves my experience on Firefox.

1. This could be under-reported problem. People will have problems reporting this bug

2. Whenever I try to save anything (image, website, Ctrl+S, print website to file, Ctrl+P, screenshots, same problem) my Firefox tries to "Open" something instead. I see dialog window with header SAVE, but the final button is labeled "Open" and after clicking it usually nothing happens. A haven't been able to save anything since this update. Only system-wide screenshots work for me now.

I had to use another installation in order to attach screenshot here. In the problematic 149.0, after clicking "Browse..." and selecting file, nothing happens, and no upload, moreover button won't respond to clicking anymore. Then I force refresh, and this text within this form disappears, but attached image appears.

3. Yesterday I have updated my Firefox to 149.0, using official debian sources, mozilla-deb - 1.0 -

cat /etc/apt/sources.list.d/mozilla.list deb [signed-by=/etc/apt/keyrings/packages.mozilla.org.asc] https://packages.mozilla.org/apt/ mozilla main

4. I have Linux Debian, (old version, Stretch+backports, yes, I am moving things already to new hdd), maybe it's related: 4.9.0-19-amd64 #1 SMP Debian 4.9.320-2 (2022-06-30) x86_64 GNU/Linux )

In order to fill this form I am using separate installation 140.9.0esr (64-bit), you could warn Debian teams not to propagate this error.

5. I have checked Console and Debugger, but they seem website-related. This error happens on every single website. Tried already troubleshooting mode, same problem. Please help us.

i am not able to access openshift ui

Secure Connection Failed

An error occurred during a connection to oauth-openshift.apps.ocp4.example.com. PR_END_OF_FILE_ERROR

Error code: PR_END_OF_FILE_ERROR

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

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