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I run normal firefox on linux. Fully up-to-date. Every time I quit the app, it reverts to a version of my profile from a month ago, and loads all the tabs I had open then, and then receives all the tabs that I sent to the device in the interim (~1 month). As I speak, it just caught the 60 or 70 tabs in this window.

I tried changing the name of my profile folder to randomstring.defaultOLD and changed one of the backups to randomstring.default. This didn't change the behavior. I'm still stuck in the loop. I saved my tabs with onetab, because firefox isn't remembering my session anymore. I thought it was something to do with updates, like it only loses its mind upon updates, but that's not true. It thinks it's updating firefox EVERY TIME, because the one time it's loading to 1 month ago it was updating, but I'm 100% sure there are no updates to firefox in my linux. It's just hallucinating.

The articles on restoring from backup are outdated. They say to use an html file. There is no html file. It's just folders for profiles, not html files. HELP!

I have Thunderbird on laptop. I make changes to a contact in the address book and they seem to be made. When I close Thunderbird and restart it, all changes are lost and are back to what the contact information was before. This has to be fixed.

Hi Team, I am facing an issue that i have setup the download setting of PDF file as save file and automatically download in my system. but firfox is not working as expected.

When I login to a site where there are many widgets (windows) on the screen - the windows are all missing scroll bars. If I login under a different browser they are there. This happened about a week or so ago. It has to be a setting change in Firefox. Please advise.

After a while bookmarks disappear from the browser tab and the only way to recover is to close the browser and open a new page that requires signing out of opened sites and starting over. Just started with new update release.

Hi, since the latest update, whenever I'm in a tab (e.g. email or personal website) and I go to upload files, all tabs show the last location of the last upload from any tab whereas previously they showed the location of the relevant tab. E.g. on a tab for my website it would previously open the location of my website files and if I switch to my email tab it would open the location of my email attachments. Now it doesn't seem to remember the loaction by individual tab it just starts in the location of the used loaction across all tabs.

Not sure if that makes sense, it's very annoying as I have to keep searching the location again between tabs.

Can this be changed back please so it remembers locations on a individual tab basis and not globally?

Thanks

For a few weeks now we have been unable to send emails through tbaytel server via Thunderbird. We get SMTP error. This happened after recent upgrades to Mozilla. Any idea when a fix will be out?

Albertsons grocery store states they support firefox. However I can't use firefox I have all sorts of issues so I have to close firefox and use chrome. What do I need to do to get firefox to work at their grocery store website?

Thank you Diana

My Firefox VPN is still showing as nearing my limit, despite it now being October everywhere in the world. Why hasn't it reset to 50GB? I've tried restarting Firefox and it didn't make any difference. It still shows "Getting close to your VPN limit. You have 2.2GB of 50GB left this month."

I am trying to transfer a number of .URL addresses held in aUGREEN NAS over to bookmarks held within Firefox so that those URLs can be quickly opened using Firefox Windows Explorer or a similar file manager in an Android Notepad or indeed another browser. The URLs already in folders in the NAS drive and it would be great if we could replicate the NAS drive folders within Firefox.. Is there a simple way of doing this?

Hi, I have Thunderbird installed and have been using it to do my email on a self hosted server and to connect to a google calendar account. This has been working for years, but now I'm finding when I accept a meeting invitation via email, its not being put through to the Google Calendar. I've reset the google calendar link a few time (deleted and created again from scratch). Its using the caldav interface to Google calendar. I'm also seeing this random message pop up (see uploaded image) - but there is no details on what to do. Anybody have any clues?

For a few days I'm having trouble with Asana mails (notification mails informing me about replies, comments, etc).

Clicking on the mail to view it freezes Thunderbird for a good 5 seconds while one CPU core spins at 100%. This only happens with Asana mails (or at least I haven't found any other problematic senders).

I guess it's a problem with validation or parsing of the mail's HTML content. But I don't know how to debug this.

I can't pinpoint exactly when it started happening, but it was around the time I've switched to the [new snap release track](https://support.mozilla.org/en-US/kb/channel-choices-thunderbird-snap-and-flatpak#w_snap-channel-changes-in-2026). But since this happens with Snap and Flatpak I think the culprit may be the 153.0 update.

Things I've tried:

• Clearing cache and msf files.
• Troubleshooting mode with add-ons disabled.
• Reinstallation. Creating new profile + importing old data.
• Switching from Snap to Flatpak
• Switching Message Body display to Plan Text or Simple HTML.
• Disabling HW acceleration.
• Checking console for suspicious output.

Anything I can do to create handle the problem or collect information for a proper bug report?

Hello,

I have had an issue for a few months now where certain websites fail to load. This is most easily reproduced on https://addons.mozilla.org, where I am shown the error "An unexpected error occurred" on most pages, preventing me from installing addons.

This issue does not occur in a Private Window, in Troubleshooting mode or in Chrome or Brave, but persists in fresh installs of Firefox. In troubleshooting this issue, I have removed all program files, registry data, and app data pertaining to Mozilla / Firefox. In fresh installs, I can sometimes install an add-on or two before this error starts occuring. I have not imported any previous data.

I was previously installing from Chocolatey, but in my last clean install, I downloaded from the official website.

I am on Windows 10 and Firefox 157. I use Proton VPN (Paid) and have tried changing servers several times to no avail. Again, this only happens in Firefox in a standard window, Private Mode and Troubleshooting Mode are fine.

Screenshot 1 shows the issue from my most recent reinstall. I was able to install 1 add-on (SponsorBlock) before it started showing up. Removing the add-on doesn't fix the issue. Trying to access addons.mozilla.org via a search engine results in the tab icon loading for a second and no change happening on screen (Screenshot 2).

I experience similar issues on other websites, like trying to log into Bandcamp.com (logging in gives the error "There was a network error. Please try again."), but most sites work.

Loading https://addons.mozilla.org/en-US/firefox/ gives the following results in the Network Console:

Uncaught (in promise) TypeError: can't access property "pressed", target is null

   onChangePermissions chrome://mozapps/content/extensions/components/addon-card.mjs:893

addon-card.mjs:893:7 Reporting Header: invalid JSON value received. collect Reporting Header: invalid JSON value received. collect Reporting Header: invalid JSON value received. collect Reporting Header: invalid JSON value received. collect Reporting Header: invalid JSON value received. collect Reporting Header: invalid JSON value received. collect

Title. 156.0 had NVIDIA Video Super Resolution working just fine. 156.0.1 has broken it on my setup. Nothing I have done has brought it back - toggling settings, clearing caches, forcing it on in about:config, etc. The plugin seems to be broken.

Was working just fine for over a year prior.

Latest Stable Firefox 156.0.1 RTX 5080 Driver 596.49 (May '26)

Does not show as working in the Control Panel, and is clearly not working on any video site. YouTube, the BBC, and Twitch were the ones most tested.

Please consider a fix. Thank you.

HI All Recently purchased a laptop and want to have FF sync with my desk top. I am signed in to both devices with the same account and have checked all settings on both and they are identical. Why are they not syncing?