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I've used Slack every day for the past decade, and Firefox has been my primary browser for some time now. I've never had an issue with the two, but now, Firefox is reliably crashing every time I attempt to open Slack.

I've tried clearing my cache both broadly and specific to Slack, with neither producing results. Even tried deleting all cookies on Firefox, which was a bit of a pain, and it was no help.

I did read up on some people encountering a similar issue that could be fixed by deleting the Slack entry in "about:serviceworkers," but this did not help here.

The only extension I'm running is uBlock Origin, which I've been running for probably as long as I've been using Firefox, and that has never presented an issue before either.

Would appreciate any help or advice on the matter.

I am really really distraught right now. It took me two weeks to get the time and focus to write a long reply to a company's nice email to me. Stayed up till 2am to write it. Deliberately wanted to re-read it in the morning before sending. Gone. Nowhere to be found. I pressed "Save to draft" before closing my laptop. But not saved. This account actually has a "draft" folder, unlike most of my other accounts in Thunderbird, which I also cannot figure out and no one has helped me with.

I seem to have installed the YouTube webapp on Firefox when I clicked 'add tab to taskbar' that's new in 143. It shows up as recently added program on Windows. When I go to find the origin it leads to Firefox.exe. I can't find a way to uninstall through the browser or on Windows. Does anyone know how?

Hey all,

For about half of the notifications I get from my google calendar, I get a dialogue warning me that the item has changed on the server and I can submit my changes anyway or discard and reload. It doesn't matter what I choose - the pop up goes away and reappears at the next notification.

I have searched for other reports of this issue and seen it reported many times in the last few years. I have tried all of the known solutions but none of them seem to fix the issue for me.

Here's what I've tried:

- Unsubscribed and resubscribed to the google calendar - Unsubscribed, shut down Thunderbird, deleted the calendar-data folder from my profile, opened Thunderbird, and resubscribed to the google calendar - Toggled "Read Only" every which way - Toggled "Offline Support" every which way - Turned off show reminders (which fixes it of course but I want reminders, that's the problem) - Deleted the offending events in my google calendar and recreated them from scratch - which has returned the same "item changed on server" warning.

I don't know what else to do at this point. I don't see any new reports of this issue so am I just missing something fundamental here? Do people not use google calendar in Thunderbird? Is it known to not work if you have an iPhone that also shows calendar notifications or something?

My desktop specs are Windows 11, everything at latest, no additional calendars other than "Holidays in the United States" (which I think comes with Thunderbird), and the BorderColors D extension to change colors of my email border depending on which address I'm sending from.

Hi, Hopefully this is Bugzilla. I've an issue and not sure if it's a bug or what. Been using these filters for years. Tried most "tricks". (rebooted, etc)

Not sure how to handle this.

Can anyone help? What do you need from me? Thanks

After updating to Tbird version 143.0, the status of fetching messages from my email accounts is no longer shown in a status bar that's just below the main message list panel.

I know messages are being fetched correctly, because they show up as unread in my message folders. I've tested sending to myself, and it works !!. I have tried poking around in setting preferences, to no avail. I want my internet email session status line back!

Both my iMac and Mac Air, running macos 15.6.1, have the problem.

Being able to see status of connecting to and fetching from my different email accounts is critical for knowing the fetch operation is proceeding .... and/or working around the occasional connection problem (like: "you're not connected to the internet, dummy !!!)

I was installing the latest vwersion and the all of my pages disappeared , plus the is not even an app to get in. Please help ... everything was on Firefox, even my bank account and email.

can you help? Firefox was updating my machine. As I remember it asked if I wanted to add  ??( I don't know) Android  ????? I didn't think I wanted it so I thought it was over and I stopped. Now I can't get Firefox -- can you help me?

When I enter a search string such as "75-0098-01", the search returns messages with only partial matches like "0098".

Is it possible to use a search string and get back results that find only that complete string?

thanks and best regards, John

Recently, some of my Gmail messages in Thunderbird open up as blank pages. And the "get messages" icon in the upper left corner of the message screen is grayed out. The messages open fine in the Gmail browser and app; it's just Thunderbird that has the issue. I've taken the following steps, but to no avail:

1. Repair folder (for the Gmail Inbox). I did this several times. 2. Deleted the index file and let it get rebuilt. 3. Ran in troubleshooting mode.

None of these solved the problem. Any suggestions?

Lately, it seems some junk mail senders have figured out how to keep me from deleting an email from my inbox, even though they've been marked as junk. They only disappear from the inbox for a few seconds, and then re-appear immediately. I can click "delete" over and over, and yet these emails boomerang right back into my inbox. Filters don't seem to work for these senders, either. I can open the filter, see that the email address is already included, click "Run Now," and all I get is a pop-up Microsoft notification that is truncated so that I can't read it in its entirety.

The main offender lately is Heavy on Packers <newsletters@heavy.com>

Why doesn't the filter or even the delete key get rid of messages from this spammer and a few others like it? How does something marked as Junk and deleted keep boomeranging back into the inbox? TIA!

I use Comcast e-mail. I can't print anything! But I have Mozilla as my server (?) browser (?) and can't get a letter to print out. I really want to access a Notepad or a Word Program to have a BLANK PAGE to write a letter to a doctor or some other person in a professional manner! Word used to come with Windows! I had to install Windows 11, but I don't like "Bing" and so I have Mozilla, which I like much better. Windows 11 is in the background! Sorry, this is confusing, moreso to ME!!!!! When I try to print a letter, I've been using the Comcast e-mail account, but anything I try to print gets "compromised" and causes overlays and no way to print out a letter!!!! I just spent $46 for a new black printer cartridge! And I need to type a letter to my doctor! Please give me some help and tell me how to install a FREE blank page. I do NOT need help writing. I like spell-check, but I am quite proficient at composing a letter. I just can't PRINT the darn thing! Thank you.

On one PC, pdf files [Type of file : Firefox PDF Document (.pdf)] display with a PDF icon but on a second PC, pdf files [Type of file: PDF File (.pdf)] display with a Firefox icon.

What changes are needed to have pdf files display with a PDF icon on the second PC?

When selecting "Sign in" on a Google Search tab, that tab refreshes every time you tap on that button without logging you in.

A copy of my report on Bugzilla below:

User Agent: Mozilla/5.0 (Android 15; Mobile; rv:143.0) Gecko/143.0 Firefox/143.0

Steps to reproduce:

Tap the Sign in button on the upper right side when searching with Google.

Actual results:

The tab force refreshes every time.

Expected results:

Successfully log in to my Google Account.

I am getting a Secure Connection Failed error on every webpage I try to visit. Even if a page manages to load it will revert back to the Error code: PR_END_OF_FILE_ERROR if I refresh. Other browsers are working fine. I tried troubleshoot mode and it's the same. I tried uninstall/reinstall, desktop restart and still the same. I haven't changed any settings on my mac.

My Thunderbird (version 115.12.2) is running on a Windows 11 system. My profile has multiple accounts configured as IMAP to multiple email services. I also have the Status Bar and Activity indicator enabled. Randomly, both indicators will show busy for an extended period of time. When I view this in the Activity Manager I see one or more folders hung for 10 or 20 minutes downloading one message out of several. This occurs in multiple accounts and servers.

I have researched this and attempted the fixes presented. I have cleared the cache files and compacted and rebuild email folders as suggested, but the slow update still occurs.

Then I decided to try and capture a ProMon.exe trace to see what is happening. What I found was Thunderbird.exe was spending all of the time while hung access the following file: C:\Users\MyUser\AppData\LocalLow\Intel\ ShaderCache\4a5eb0e65e559fc08e65ecb2fa9d650817ae895582a7a7ede162866d3e47a05a, like it was stuck in a loop.

When Thunderbird is operating normally, it is accessing this file but only for short period of times. Research says that it is ok to delete the files in this folder. I did that and it seemed to help for awhile. But it started happening again.

Does anyone have any idea what could be causing this? Is there a Windows thing to look further into? Any help would be greatly appreciated.