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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).

Running into a strange issue where the welcome message page does not go away when clicking between messages. I already attempted to remove the message pane all together. (F8) but nothing seems to make it go away. Usually upon launching Thunderbird it will show the welcome message but will go away when navigating between messages.

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!

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?

Apparently Windows 11 won't upgrade from v23H2 to 24H2 because the very nice cpu (and system) don't support SSE4.2 or PopCnt instructions. While v23H2 won't get updates after November of 2025, I tend to use operating systems WAY beyond no more updates without problems, and only upgrade when browsers no longer update and support some websites, notably banking and credit card sites, for example.

Any way to get at least a rough idea of when/how long Firefox will continue to update on Windows 11 23H2 so I can plan ahead? Usually it's a year or 2 or more after Microsoft stops updating the OS.

Thanks.

Hello, Many thanks for providing thunderbird. After the last update to 115.180.0 (Linux Mint 20) my inbox is shown in a way, that I can not read it anymore. I really do not how to describe it properly. So I attached a screenshot on the part I find difficult to read. I think there is a off by one between the column header an the content. Downgrading to a previous version was not possible - the profile was changed. Can I fix this myself - if yes how. Looking forward to your reply.

I use Thunderbird on two user IDs on the same Mac, which is running macOS 15.3.1.

I usually run Thunderbird updates on user 1, but this time I ran the it (to 128.7.0esr) on account 2, and I can no longer launch it on user 2. (Note: Neither user is an admin account.)

Steps: 1. On user 2, launch Thunderbird. 2. Get the dialog that there's an update to 128.7.0esr. 3. Click the Restart to update button. 4. Get the dialog that there's an update to 128.7.0esr. 5. Click the Restart to update button. 6. Get the dialog to enter admin ID and password for installing the Thunderbird helper. 7. Enter the admin ID and password and click OK. 8. Get a (surprise) dialog to authorize Thunderbird to discover my devices. 9. I choose to deny.

Expected result: Thunderbird relaunches, now with 128.7.0esr. Actual result: Get the dialog to enter admin ID and password for installing the Thunderbird helper.

10. Log off user 2 and log on to user 1. 11. Download 128.7.0esr from the Mozilla website. 12. Check the hash. 13. Install, choosing to replace the old Thunderbird in the shared Applications folder. 14. System Settings, About, System report, Applications 15. Verify the signature is signed by Mozilla 16. Launch Thunderbird

Expected and actual result: Thunderbird launches and I can use it normally.

17. Log out of user 1 and log into user 2. 18. Launch Thunderbird

Expected result: Thunderbird launches and I can use it normally. Actual result: Get the dialog to enter admin ID and password for installing the Thunderbird helper.

I'm guessing there's some manner of residual file that's preventing Thunderbird from launching on user 2. I've verified Thunderbird is in the system's Application folder and not in user 1's files.

How do I clear the pending install from user 2 so that Thunderbird will launch for user 2?

I'm on the Release channel, but was updated to 142.0 Beta. Surely this is wrong. I am not on the Beta channel. I just want to stay updated to the most recent stable release.

Thunderbird version 142 seems to have affected OWL. One of my email accounts that is on a microsoft server has completely disappeared. Please help. Am I able to go backwards to a prior version.

I'm stuck using MacOS 10.14 right now, so I can't use anything newer. I know everything listed here is an old, unsupported release with its own security concerns. Let's get that out of the way. OK, good...

Right now, I'm on TB 102.15.1, and I'm wondering about TB 115. If I go to the About box, it's prompting me to update to 115.10.1.

If I read the release notes for 115.10.1, it says, rather worryingly:

Known Issues unresolved

After changing password on an IMAP account, the account could become locked due to too many failed login attempts.

Does anyone know if this particular bug was fixed via later releases in the 115esr series?

I'd rather not leave TB 102 if the above bug is still a concern.

Thanks!

I want to switch back from the Thunderbird Release channel to the ESR channel but I do not understand the steps. Please help me with the exact, easiest steps. I am running Win 11.

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

The latest Firefox release (141) on Android introduced a couple of new features marked as "progressive rollout", e.g. the ability to protect private tabs via PIN, while the release also brought regular updates, e.g. security fixes.

Does someone know how a progressive rollout of such a feature works technically for the userbase? How can a release be rolled out, but some of its features be kept back while other changes apply to all?

For example, the ability to set a PIN for private tabs is a local user preference configuration. The user may or may not have a user sync profile. How is it possible to rollout the feature progressively on the same release channel? Or does the progressive rollout imply the first group of users receive the feature with consecutive minor releases, e.g. release 141.1, the next group with 141.2, etc?

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!)