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So I just noticed after downloading the new update to Firefox, version 139.0.1 that something new came up in my task manager called Crashhelper. Never seen this before. Closed it down and it seemed to have no issues shutting down at least. I haven't had Firefox crash in recent months, so I'm assuming that this cropping up might be a glitch of some kind? I looked this up to see if anyone else had this issue, and it seems someone on Reddit did encounter this, on Linux, and another on Windows also seems to have run into it. How do we stop this from coming up whenever we start up the browser?

I have exported my theme made in Firefox Color (love it) - both xpi and zip. The theme has been working for 2 weeks. I just want to reinstall it to check, and eliminate Firefox starting with "default" and then loading my theme. I also have no backup if I had a computer malfunction.

I'm not sure how it can be "corrupt" since I'm looking at it working right now. I exported using your site and your buttons - but when I try to install it says "unable to install because it's corrupt."

Your new update deleted all of my favorite bookmarks. Many of which were for business and special research. How do I recover them? They are beyond price. Their loss is a complete catastrophe!

My new email address is: roger.bus@yahoo.com

I am trying to upgrade from 128 esr version to the new 139 version. I tried several ways to transfer data from the old version to the new version - I tried to export and import a the Thunderbird zip file. I also tried to open profile manager and creating a new profile that refers to a copy from my old version. Nothing has worked. In the old Thunderbird 128 version, if I select Help and Troubleshooting Information and then Open Folder next to the Profile Folder I get an error in Thunderbird that it can’t find my profile. I get the same error message when I go to Tools, export and select "open profile folder." This in spite of the fact that the old version continues to correctly display my contacts, tasks and events

After several hours of this, I finally decided to download version 139 using the standard Mozilla set up even though my Thunderbird 128 version is located someplace else. So, at this time I have two working versions of thunderbird on my computer – the old 128 version with all my data and the new 139 version with no data.

I think I need help figuring out which Profile has my contact, calendar and task data. Then I need help getting it to the new version.

Thanks

Luke

This app comes with lots and lots of updates, and every time I have to delete the old start icon on the task bar and re-pin it. Please, fix it so that I never have to do that again. There is no other software at all including Mozilla Firefox that does this to me.

Have been currently using Thunderbird (Release 128.11.0esr (64 Bit)) on a desktop over the last 10-12 years. I have now updated my PC and want to transfer the existing software and all the stored emails to the new PC which is running on Windows 11.

How can I do this please?

I can find the sites I use, this isn't the issue. I want to check I haven't been hacked in some way, which is more of a concern particularly over online banking and internet financial transactions. Thank you for your attention. Stephen

Hello,

I have download and installed the latest version of Firefox, have the following issue click on help on the menu but the following message appears on the screen unable to check for updates, have remove Firefox and install it again but no good.

Any help would be appreciated

Thanks Matthew

Dear Mozilla,

you should be clearer in new Firefox versions about which changes need to be manually enabled or are being rolled out in stages. It’s really frustrating to keep reading about new features and being asked (I have the new version X - according to the news, Y should work...) only to find out that these features either arrive delayed to the end users or need to be activated manually.

And please give the user more choice about whether they want to use new features (for example the "https://" trimming, volume icon in tabs...) and provide an easier option than tinkering with the "userChrome.css".

Thanks and best regards, Martin

I had installed an extension that allowed me to transliterate Cyrillic text. I think it was called Transliterator.

Today I noticed it went completely missing - it's not even listed at the bottom of about:addons as disabled.

What happened to it?

TIA

The latest update to 140.0b2 of the Devloper Edition turned the leters of the side panel to black... On a dark background. Some themes will make the background white and it makes it readable, but a whole bunch off themes (including my prefered ones) have become useless since the last update becaus eof this bug: the letters of the bookmarks in the side-panel are fixed to black. How can this be resolved?

Hello, I am using Kubuntu 24.04.2 LTS on a Lenovo T470. After a regular installation of updates via Discover three days ago, thunderbird can no longer be started via the icon in the window bar (message: KDE -Plasma workspace: The file or folder /snap/thunderbird/644/usr/lib/thunderbird/thunderbird-bin does not exist).

I was able to start thunderbird via the menu (the location now appears to be /snap/bin/thunderbird), but the profile and all mails have disappeared, as if I had reinstalled thunderbird.

The Personal folder/snap/thunderbird folder contains the folders 721, 734, common and current. Only common has something, but very little content (25 MB).

I set up my profile again in the post-update thunderbird (no problem thanks to imap-server), which works well. However, now I have two icons: If I click icon no 1, thunderbird starts as a new installation without any profile and mails, icon 2, thunderbird starts with my profile.

Can anyone make sense of this strange behavior?

Running MacOS 15.5. Former Firefox user, have not used Firefox for many months. Recently (last few months) when trying to startup Firefox it has not run successfully; always fails with an error message something like “Unable to load user profile …” and then Firefox immediately exits. Today downloaded newest Firefox v139.0. Now the same thing happens; but the failure message comes in Icelandic and Firefox exits immediately. How can I get past this ?