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Hi, somehow thunderbird forced me to use OAuth for caldav and carddav. (v140 on linux) Unless I've probably missed something this approach doesn't seem to have considered that people might use more than one device. In the past I had an application password per device with my mail provider. That password covered imap, smtp, caldav and carddav. The application password I could set with a specific name at my mail provider. If the device was lost, compromised or whatever I just deleted that one application password at my mail provider, problem solved.

Now a regular thunderbird setup has the application password for mail and 2 OAuth records per device under "Connected Apps" at my mail provider. But it is not possible to see anymore to which device the OAuth record belong, as there is nothing device specific coming along with these OAuth records, just an IP.

With that perspective OAuth weakened my security options, as I can only guess which OAuth record I have to delete in an emergency case. Did anyone who implemented that with Thunderbird considered that people may have more than 1 device? Maybe even more than 5 devices?

That OAuth approach looks unmanagable to me. Is there a way to switch OAuth off in thunderbird, until it becomes more useable in >1 device setups?

Cheers Tjareson

When I try to log into Tangerine bank I get the error. "We're sorry for the inconvenience. This function is currently unavailable. Please try again later."

This issue started Oct-13-2025 and it appears to work when using Firefox ESR 146.01 but not the regular Firefox 146.01 versions. Tangerine is not giving me information on the error and I was wondering if there is a difference between the ESR and regular version that might clear up this issue?

I would like to know how I can control the timing of compacting the mailboxes under Linux and Windows. The reason why I ask is that every time compacting needs to be done, the prompt to do so comes up as soon as the Thunderbird interface finishes loading but before all of the mailboxes are finished updating,which can take several minutes. If I accept the compacting, it inevitably returns an error that it could not run because the mailboxes are still updating. Or I can cancel until I go through this the next time.

It would seem like a simple matter to either give the user a way to delay the compacting process, or have Thunderbird not initiate it until it is safe to do so to begin with.

I have tried to research this but have not found any answers.

Firefox worked this morning, but stopped in the afternoon. I ran an update, but could not connect to my gmail account anymore, or listen to the Radio France podcasts All this works from Google Chrome (not my default browser). All under the Mozilla VPN 2001:4860:7:150e::fc (why the IPv6 address?)

Firefox 148.0 (20260216153405) Details Installed on: 26 February 2026 at 18:55:57 Status: The Update was successfully installed

~> uptime

21:59:01 up  1:22,  1 user,  load average: 0.47, 0.38, 0.32

~> uname -a Linux tanya 6.8.0-101-generic #101-Ubuntu SMP PREEMPT_DYNAMIC Mon Feb 9 10:15:05 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux ~> cat /etc/os-release PRETTY_NAME="Ubuntu 24.04.4 LTS" NAME="Ubuntu" VERSION_ID="24.04" VERSION="24.04.4 LTS (Noble Numbat)" VERSION_CODENAME=noble ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/" SUPPORT_URL="https://help.ubuntu.com/" BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/" PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy" UBUNTU_CODENAME=noble LOGO=ubuntu-logo

Thanks, Marc

I have vertical tabs enabled and the "expand when hovering mouse" option is activated (see screenshot). However, the latter functionality tends to glitch at some point in basically every session. I can't tell if a specific action triggers it, so far it seems pretty random. The glitch is that either the tabs are expanded and won't collapse, or the opposite: they're collapsed and refuse to expand when I point at them. Is this feature maybe still experimental? or something? I'm running Firefox 149.0b5 DEveloper Edition on Garuda Linux (Arch based).

There seems to be no possible way to change the shortcut for peeking at the tabs in the sidebar (when sidebar revamp is enabled) from the about:keyboard UI. I have so far managed to modify the shortcut through intercepting function calls.

What I have done: 1. Read through the JS source code for about:keyboard which says the shortcut ID is `toggleSidebarKb` 2. Added hooks to intercept `RPMSendQuery` calls 3. Modified the shortcut through devtools open on the about:keyboard page with the following snippet

```js await RPMSendQuery("CustomKeys:ChangeKey", {

 "modifiers": "accel",
 "isValid": true,
 "key": "S",
 "shortcut": "Ctrl+S",
 "id": "toggleSidebarKb"

}) ```

The way I am doing it is definitely a hack. I am not sure if I am missing something. Although the shortcuts for bookmarks, history, and GenAI chat sidebar are present, there seems to be no entry to change the sidebar toggle shortcut itself. I'd love to work on this but I haven't been able to mach bootstrap on NixOS.

Thank you for any assistance :)

A pop-up suggested that I use profiles to organize and it sounded like a great idea but then after making profile I was having trouble getting tabs from one page to another. Then I discovered that I had to log in my accounts onto every profile I made and it sounded like a terrible idea, so I tried deleting all my profiles to get it to revert but now that I open the browser it shows me to make a new Profile. So, I want to know how can I revert back to using Firefox Without the use of profiles like I was before clicking the pop-up

I've been trying to decipher browser.tabs.insertXXX with little success. What I want to achieve is to open tabs from the same site next to the current tab with the most recently opened tab next to the original tab.

Example Two tabs are open, site 1 tab 1 and site 2 tab 1. Open a new link to site 1 on site 1 tab 1. The order is site 1 tab 1, site 1 tab 2, site 2 tab1. Open another link to site 1 on site 1 tab 1. The order is now site 1 tab 1, site 1 tab 3, site 1 tab 2, site 2 tab 1.

Thanks in advance.

When I'm on a site that I've accessed on my main machine or phone (Apple), but try to use my Apple ID when logging on via the Firefox browser on my Linux machine, I get a popup asking for a fingerprint. None of my devices use a fingerprint. I get it needs confirmation, but very rarely you get the dotty circle to use with your phone camera, but not all the time. How can I make my life easier and get the dotty circle all the time, or force things to go to my phone for confirmation that it's me - face ID or something.

I've looked on my Apple stuff and can't find anything that will help, so I'm reaching out!

I frequently get messages that are all messed up due to fonts. Lines overlap, symbols instead of characters, etc. Is there some way to have Thunderbird use some other substitute font than this? Thunderbird 140.8.0esr (64-bit) on Linux Mint Cinnamon

Subject: Request for Custom Provider Support or Grok Integration in Firefox AI Chatbot Sidebar

Detailed Description: I am exploring the new AI Chatbot sidebar feature in Firefox (Ubuntu build). As a practitioner in the deep learning field, I am particularly interested in the flexibility of the Web-view container used for these AI integrations.

Currently, the feature appears to be a curated list of providers (ChatGPT, Claude, Gemini). I would like to request the addition of Grok (by xAI), or more importantly, a Generic Provider Framework that allows users to manually configure custom endpoints.

Technical Specifics & Implementation Questions:

   Manifest Configuration: Is the sidebar AI provider list controlled via a remote settings push, or is there a local about:config or JSON manifest (e.g., within the browser resources) that can be modified to include Grok's web URL?

   Context Injection: How does the current sidebar handle DOM context for features like "Summarize this page"? If I were to manually add Grok via a side-loading method, what are the required API hooks for it to achieve parity with the built-in providers?

   User Agent & Authentication: Are there specific CORS policies or User-Agent strings enforced within the sidebar's iframe/browser-view that would prevent Grok’s X-auth or real-time streaming (SSE) from functioning correctly?

Use Case: Integrating Grok’s real-time information retrieval directly into the browser’s native sidebar would significantly optimize research workflows involving live data, which is a key differentiator from the currently supported models.

I noted, that credit cards autofill works, but on ~50% of websites it fails. I can see the autofill dropdown, but if I select any card, no fields are filled. Manual filling works. One of examples: https://ipn.paymentus.com, but there are many. Again, on some websites it works just fine.

Another issue - I cannot edit cards. Settings->Payment methods->Manage, then select a card, press "Edit" and nothing happens.

Context: version 148.0 (64-bit), Canonical snap build (crap, I cannot DISABLE snap build and totally switch to deb!!!)

P.S. I really miss feature to add "aliases" for cards...

I have Version 140.8.0esr | Released February 24, 2026, for Linux Mint (up to date)

I have a CardDAV address book on a Nextcloud instance that i want to sync to Thunderbird.

When i open Address Book and the clikc on " Create a new address book" the Account Hub modal window opens. None of the 4 options (including Add Remote Address Book" do anything, i.e. I can click as much as I like but nothing happens.

• OS: Debian (trixie)
• Firefox version: 149.0b3

Firefox suddenly crashes without any displayed error. Attempt to troubleshoot it in "safe mode" doesn't help (it also suddenly crashes.

• When I had redirected following output: "Exiting due to channel error."
• after restart, I launched "about:crashes", but there were no entries

I updated my TB to version 148 (from 140) on a Linux Mint 22.3 - Cinnamon 64-bit. After the update, events recorded in my Gmail personal account, keep popping up and do not allow neither Dismiss or Snooze - Buttons not even work. If you close the reminder window, the Reminder window pops-up a few minutes later.

Interesting is that beyond my personal Gmail account I have a couple other in Google Workspace and they work well. It is something only related to Gmail personal.

"Read Only" in Calendar Properties is unchecked

Any advice will be highly appreciated.

System Configuration

• OS: Pop!_OS 22.04 LTS (Clean install).
• GPU: NVIDIA GeForce RTX 4050.
• Driver: system76-driver-nvidia (Enabled).
• Graphics Mode: Hybrid (Command: system76-power graphics hybrid).
• X11 Scaling: Optimized for gaming/full-screen apps.

Firefox Picture-in-Picture (PiP) Issue

• Problem: PiP window loses "Always on Top" focus or vanishes when switching workspaces/tasks.
• Config Changes: Set 'focusmanager.testmode' to true and 'media.videocontrols.picture-in-picture.video-flips-visibility-on-focus-change' to false.
• Window Settings: Focus set to "Click" via GNOME Tweaks/Settings.
• Environment Test: Tested launching via 'MOZ_ENABLE_WAYLAND=0' to bypass Wayland focus logic.

Software & Tools

• Tweaks: Installed for font hinting (Slight) and window behavior management.

Using firefox 148, when I select the "CIRA Canadian shield" DNS over HTTPS option it does not work. If I select the other 2 options Cloudflare or NextDNS those options work.

What is the problem with DOH for CIRA option ?