session backups inadequate

I keep a lot of tabs open (~60) in any particular session - I find it's faster in this way to get back to a site. About every six months or so, I lose *all* these tabs b… (read more)

I keep a lot of tabs open (~60) in any particular session - I find it's faster in this way to get back to a site.

About every six months or so, I lose *all* these tabs because of Firefox's inadequate session backup system. It only saves two or three total backups, some of which are completely out of date. But the worst scenario is when (1) some site pops up a new window; (2) I mistakenly close my main window before the new window; (3) I open this new saved window once or twice by accident, causing my 60-tab session backup to be overwritten.

Using a third-party session manager (I have tried all the well-known ones) can mitigate this problem, but doesn't really solve it because the re-opened sessions aren't quite in the same format as Firefox sessions and so lose information. In particular, I often lose each tab's icon as well as metadata for Tree Style Tab.

Could Mozilla please consider a more robust session backup system for Firefox? All it would take (I think) is to allow the user to choose the total number of backup sessions and the frequency at which a new session is added. Thank you!

Asked by carl.andersen 5 minutes ago

Application error: a client-side exception has occurred (see the browser console for more information).

Fix for RangeError: invalid language tag and client-side exceptions in Firefox on Linux Hi everyone, I was experiencing persistent JavaScript errors in Firefox on Linux … (read more)

Fix for RangeError: invalid language tag and client-side exceptions in Firefox on Linux

Hi everyone, I was experiencing persistent JavaScript errors in Firefox on Linux when loading certain modern websites (e.g., built with React or Next.js). The browser console showed messages like:

   RangeError: invalid language tag: "chrome://global/locale/intl.properties"
   A client-side exception has occurred (see the browser console for more information)
   React error #418 with minified stack traces

This happened even in Safe Mode, with all extensions disabled, cookies/cache cleared, and Enhanced Tracking Protection off. ✅ Root cause and fix:

Turns out the issue was related to missing or broken locale configuration in Firefox. To fix it:

   Open about:config
   Create a new string entry:
       Name: intl.locale.requested
       Value: en-US (or fr, en-GB, etc. — any valid locale)
   Restart Firefox

After adding this key, all affected pages started working correctly. The invalid "chrome://global/locale/intl.properties" error in intl.accept_languages disappeared as well — it seems that was just a side effect of the missing locale setting. 🔁 Summary:

If you’re seeing RangeError: invalid language tag and React crashes, try adding intl.locale.requested manually. This fixed the issue entirely for me on Linux.

Hope this helps others!

Asked by Clément 2 hours ago

Firefox PDF Editor Save to PDF not saving the changes

I am using the FireFox PDF Editor to annotate a PDF, however, no method of me saving the document (whether that is save as, or save as PDF) will allow me to save any anno… (read more)

I am using the FireFox PDF Editor to annotate a PDF, however, no method of me saving the document (whether that is save as, or save as PDF) will allow me to save any annotations on the document. If I try doing save as PDF, the preview shows up as blank sheets of paper, when I click "save as" it only saves one page of the 31 as BLANK. If I try doing normal save as, the saved file is un-annotated.

Please help... thanks

Asked by lincolnxu.ca 5 hours ago

Not logged off on old phone

I returned a phone that I had for 2 weeks (the phone was a Motorola G Stylus 2024, if that's even relevant), and while I did a factory reset on the phone before returning… (read more)

I returned a phone that I had for 2 weeks (the phone was a Motorola G Stylus 2024, if that's even relevant), and while I did a factory reset on the phone before returning it, I am worried that my Firefox account information is still accessible through the device.

One reason why I am worried is because, when looking at synced windows open, *everything* that I had open on there was open and accessible through my account. Another reason that I am worried is because I did not log out on the device before returning it to my local Best Buy.

It'd probably be impossible to track down the exact phone that I had, but can anything be done? Should I redo my log-in password for Firefox (or even all the sites that I used on that phone) or am I worried over nothing?

Asked by k.george805 6 hours ago

History wiped on exit with options not working as per requirements.

Ok so I usually choose these option to remember history and from time to time delete Browsing & download history and Temporary cached files and pages. https://asset… (read more)

Ok so I usually choose these option to remember history and from time to time delete Browsing & download history and Temporary cached files and pages.

https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2025-06-28-08-45-55-a5277f.png

Note: I have "Open previous window and tabs" ticked in general settings which also has a restore previous session option in the history menu. This brings back previous session with tabs etc as is when I close FF. https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2025-06-28-08-45-51-cf2daf.png

I thought I could automate this on exit but don't think its working right. So I change the option to "use custom settings for history" and tick all three options:

Remember browsing and download history Remember search and form history Clear history when Firefox closes For "Clear history when Firefox closes" I ticked Browsing & download history and Temporary cached files and pages. https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2025-06-28-08-45-43-b10213.png

The issue is the restore session option is missing and FF opens with all previous tabs gone. I am frankly not even sure what else is missing such as cookies, site data etc. Is this meant to work like so?

Asked by Mrsash 2 weeks ago

Last reply by Mrsash 7 hours ago

about:support page many configs are blank when i change my profile

I use scoop to install firefox. then i changed the default profile to the Scoop profile. Then i tried to log in the mozilla account but it keep saying that it cannot cont… (read more)

I use scoop to install firefox. then i changed the default profile to the Scoop profile. Then i tried to log in the mozilla account but it keep saying that it cannot continue because cookies or localstore are disabled. Then i checked the about:support page like i said in the titile, many configs are blank. Maybe some problems with the profile i guess. I also opened a issue in Scoop githup repo, they cant reproduce my problem. Where could go wrong? Any help would be appreciate!

And this is the issue i post on github https://github.com/ScoopInstaller/Extras/issues/15770

Asked by LOYINuts 9 hours ago

The error in downloading files is causing abnormal web browsing.

There was an error when downloading files with the browser, indicating that there was a problem with the file directory. The download failed, and changing the file direct… (read more)

There was an error when downloading files with the browser, indicating that there was a problem with the file directory. The download failed, and changing the file directory was still ineffective. Then, it resulted in a situation where no web pages could be opened, as if the network was disconnected. After closing the browser and reopening it, it returned to normal, but the download still could not be used. This problem has existed since versions 115.24 and 115.25.

Asked by hyrjdq 9 hours ago

Firefox does not play sound despite being attributed to correct device. All other apps OK.

What the title says. Firefox just isn't playing any sound whatsoever. Troubleshooting: Volume mixer indicates that Firefox is using my speakers, along with all other… (read more)

What the title says. Firefox just isn't playing any sound whatsoever.

Troubleshooting:

  • Volume mixer indicates that Firefox is using my speakers, along with all other apps. When playing a YouTube video, the green bar is not bouncing. However, all other programs that play sound do so successfully and their green bars are bouncing (see attachment).
  • Other web browsers play sound successfully.
  • Restarting Firefox and my computer did not help.
  • Switching the default sound device and changing back did not help.
  • Changing to headphones made no change.
  • Tabs are not muted.
  • Autoplay settings in about:preferences showed that audio and video were disabled, however changing this setting to allow video and audio, then restarting both Firefox and the computer did not fix the problem. I have no idea how that setting was even changed to begin with. O_o
  • Started Firefox in troubleshooting mode; still no sound.
  • Started Firefox in a different profile; still no sound.
  • Started Firefox in private mode; still no sound.
  • Tried ending the audiodg.exe process in task manager and restarted; still no sound.
  • Double checked media.autoplay.blocking_policy, was set to 0.
  • Double checked media.block-autoplay-until-in-foreground -- changed from true to false, restarted Firefox; still no sound.
  • Disabled hardware acceleration; still no sound.
  • Refreshed Firefox; still no sound.
  • Complete uninstall, including the usage of BCUninstaller to uninstall "leftovers". Reinstalled. Still no sound.

I have Apollo installed on my computer and I've reached out to them before for similar issues, but the dev was insistent that Apollo does not cause sound issues. I'm somewhat sceptical, but they're not being helpful at all so I thought I'd ask here, and disclose usage of Apollo so that all bases are covered.

Thank you for your time.

Asked by Umbravita 2 days ago

Last reply by Umbravita 12 hours ago

LastPass icon not working

When I click on the grey Last Pass icon, a "set preferences" screen is shown. The strictly necessary box is selected and I cannot change it. The Voluntary data collecti… (read more)

When I click on the grey Last Pass icon, a "set preferences" screen is shown. The strictly necessary box is selected and I cannot change it. The Voluntary data collection box is clickable but does not make any difference if it is checked or unchecked. The screen is locked, no matter what I click or unclick. The only thing that I can do is to click the grey LP icon which closes the window.

On two other very similar computers, when the grey icon is clicked, I can search for passwords, alerts, account, etc. Why does the icon work on this computer. I've deleted the addin, deleted Firefox and reloaded several times.

Thank you

Asked by cruisertwo 12 hours ago

Google search engine.

Hi, Google, is my search engine of choice on Mozilla Firefox, and the Os on my computer is Windows 10. Google search is no longer active from any scroll down or top tab b… (read more)

Hi, Google, is my search engine of choice on Mozilla Firefox, and the Os on my computer is Windows 10. Google search is no longer active from any scroll down or top tab bar. Have a nice day.

Asked by zx10rcurvsrr 19 hours ago

login password for bank

I currently use an extension to fill passwords, so I have passwords in firefox turned off. However, one of my logins shows an 'eye' which I believe is firefox wanting to… (read more)

I currently use an extension to fill passwords, so I have passwords in firefox turned off. However, one of my logins shows an 'eye' which I believe is firefox wanting to provide the password. I don't know how the eye got there, as all my other logins work with the extension. I have to go to the extension and physically copy the password to paste it in the password box. If I go to firefox settings, I have no passwords set. How do I get rid of the 'eye' for that login?

Rick

Asked by rrsum 19 hours ago