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My local folders are missing. There is nothing in my profiles to recover from. This is the second time this has happened after a Thunderbird update. Last time the local folder were found in my profile and I was able to restore them, This time there is nothing to restore. Has this happened to other users?

I'm running Firefox browser 88.0 (64) bit, and have been trying since before Xmas to upgrade it to a newer version. It's installed on an older Dell laptop running Ubuntu 16.04 LTS (which I've also tried repeatedly to upgrade without success).

I've tried to upgrade both through the UI, but also tried using the command line in Terminal. Per advice in other threads, I've found the best mirror site and changed my settings to use that, but still no luck. Even the preliminary "sudo apt update" via Terminal fails; the first error tells me that the public key is not available. I assume that's the place to start, but don't know how to correct it.

I'm up against the deadline for updating my browser, and would very much appreciate any help you can provide. (Please note that I'm posting from a newer computer, so automatically generated info about my system won't apply. See the screenshots for that info).

Greetings! I downloaded Thunderbird for my new Win11 desktop, but it gave me an ESR version 128.9.1. It's working fine, but can i just move to the current 137.0.1 version? If so, how do I do that - just grab the current version and install on top of the ESR or should I remove the ESR first? Thanks in advance!

Can anyone tell me, please, how long I should be able to keep accessing Firefox on a Windows 10 tablet after Microsoft withdraws support for Windows 10 later this year? I seem to remember being able to access the internet on an old laptop as a 'test' a year or two after I'd stopped using it after Microsoft stopped supporting whatever version of Windows was on it, but I can't remember whether it was via Firefox or Internet Explorer or some other Microsoft browser. If Firefox will still 'work' will Microsoft withdrawing support for Windows 10 have any effect on how well it 'works', and/or how secure etc it will be? I am going to try to install some sort of Linux on the tablet (well) before Microsoft abandons Windows, but if it turns out I can't install Linux, I'm hoping I should at least be able to access the internet via Firefox. Thanks to anyone who can help. (ps I'm not sure whether this is the right place to post this question, it's just that performance and connectivity seemed to me [in my ignorance] to be most appropriate!)

There must have been an update for Thunderbird that screwed up the way I have been using Thunderbird for years now. I had sub folders under inbox. For example, I had an investment newsletter go into a sub folder under inbox labelled "inv". I had a filter set up to move emails that had the name of the newsletter in the title to go to that "inv" folder. In this new version of Thunderbird, those separate sub folders are gone. The filters are still there but the folders are gone. Now all emails just go into the inbox. Is there a way to roll back to a previous version?

TIA Eric

W11 24H2

I just received an update to FF 137 and my userchrome.css which is set to show tabs BELOW the toolbars (i.e. a logical place above the relevant pages and not halfway up the toolbars etc.) has stopped working. Checked the toolkit.legacy etc and it's still enabled.

Any ideas to fix this are welcome.

Greetings.

I am using an old Linux Mint version. I got messages that my Firefox needed to be updated.

I finally figured out how to do that and updated it. I started to use it. No problems.

However, the update did not change the default Firefox in the menu or on the taskbar panel below. If I click on them, I get the old version.

So when I restarted the computer, when I clicked on the Firefox shortcut icon in the lower taskbar I got the old version with the tabs that were on it. I had to go back into the Firefox file downloaded for the update in order to open the new version.

So, how do I get a working shortcut icon for the new version and get rid of the old version/icon?

Thanks.

David

Recently we've began installing Firefox 140.2.0esr to our environment via the .msi file that Mozilla provides, however we're running in to a very odd incident.

After approximately 24 hours from installing Firefox esr to devices, it appears that the application is "updating" to 141.0.3 on the "release" channel. As far as I'm aware, this shouldn't be possible to begin with. But we've applied these settings via GPO:

Computer Config > Policies > Admin Templates > Mozilla > Firefox Application Autoupdate = Disabled Pin updates to a specific version = Enabled = Set to 140.2.0 Background updater = Disabled Disable Update = Enabled Manual Update Only = Enabled

After applying the GPO, confirmed this appears within the registry:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox\ AppAutoUpdate = 0 AppUpdatePin = 140.2.0 BackgroundAppUpdate = 0 DisableAppUpdate = 1 ManualAppUpdateOnly = 1

At this point, I'm at a loss. We cannot have rapid release be what's installed in our environment. Is there something broken with 140.2.0 or are we doing something wrong here?

Hello,

Moving from an older Ubuntu 18.04 machine where Firefox is limited to version 113 to a newer machine running Mint 22 where the current version is 134.

I know how to transfer the profiles but I could not find any information on compatibility.

Would I need to install other versions before 134 to handle any changes?

Thank you

Your latest request for donations has evidently come with a forced upgrade which I did not authorise. I have been happily using an older version of TB because it supports my add-ons and themes. Now because of your uninvited intrusion they no longer work. Furthermore it seems that I can no longer download an older version that supports my requirements. NOT HAPPY!

I recently changed onto the new release channel by installing version 136. I now find that this new release channel appears to have installed version 138, but it is reported as a beta version. I do not want to use beta versions, as I am having a lot of problems with it, so how can I return to a stable release?

What does this mean? being updated by another instance

Is this why my FF is running godawful slow today?

Pages coming up in 20 to 60 seconds or more instead of in a second or two.

Hi,

Thunderbird Desktop is now available in the Monthly Release Channel, with version 136.0 released on March 4th, 2025.

More information about this release is not yet updated in the Release Notes.

Currently, only information about the ESR channel is available in the Release Notes.

I try to update Firefox once a month, but every 6 hours I am notified about the release of a new version, so I have to click Cancel. Is it possible to increase this interval (at least to 24 hours) or disable it altogether?

I tried changing settings "app.update.interval" and "app.update.background.interval" but it didn't help.

After updating my Thunderbird mail application from version 128 to 140, the shortcut icon for composing a message is no longer responsive and I cannot create a new message from it. I can no longer create a new message without right-clicking on a sent email and using “Edit as New Message (E)”. How can I get back to being able to create a message from the message creation shortcut?