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I want Thunderbird to stop marking everything I delete as having been read. The way it works now, if I accidentally delete mail that I haven't read yet it's much more difficult to find it when everything is marked read even when it wasn't. I searched everywhere and haven't come up with a solution for this. It was reported as a bug years ago and was never fixed.

I tried logging into my account on a website. I decided to click on the passkey option to log in. Firefox had ask to access my passkeys and I mistakenly declined. But the pop-up doesn't happen again. It goes straight to "authentication failed" without trying to ask me again to access the passkeys. I don't see any setting for this in the settings page.

How do I change the permission to let Firefox access my passkeys? Or how do I make Firefox and Windows ask for my permission again?u I'd like to not have to reinstall Firefox if I could.

after the recent update I could no longer 'like' articles or comments on substack, and I couldn't post comments, either. looks as though there was a fix the next day, because I was again able to 'like' and comment...but then late that night I was suddenly back to square one. exactly the same issue. it's now been a couple of days and I still can't 'like' or comment on substack.

this same thing happened after an update many months ago, and after a week or two I just switched to opera. checked firefox again in september or october and it was working so I stayed. I'd like to keep using firefox but the substack problem is annoying. why did it work for about eight hours and then stop again? it seems as though substack is the poor step-child. hope you can get this fixed! because having to change browsers is also annoying...

thanks!

Recently started having odd behavior from FF, crash sometimes when opening a video in PIP, crash every single time I open a new private window with hotkey.

Had some freezing as well as right-click menus not showing options, those went away by enabling HW acceleration.

Submitted crashlogs and found a bugzilla link refrenced. https://bugzilla.mozilla.org/show_bug.cgi?id=2000475

Can I downgrade to 144.0 without losing profiles/settings/passwords and history? Do I just download the 144.0 installer or is there a different process for downgrading? (I am assuming this could help exclusively based on the bugzilla refrence, it might not)

Not sure what else to do, FF is still freezing after watching videos for a few minutes, I am not even sure if this is strictly a FF issue or a Win 11 issue.

i love firefox. i tried Firefox, firefox developers, Firefox other forks. i have same problems with them:

1- i cannot copy link's text. it is easy for other browsers, but Firefox doesn't have.

2- when i use search engine i have probles (Google, yandex, bing etc). Imagine that I search for a topic successively on a search engine. Then, when I press the back button, it's like I've pressed back two/three times. Then, when I press the forward button, it's like I've clicked forward three times. (example: first your search 'real madrid football match', then 'real madrid team stats', then 'real madrid vs barcelona', then 'real madrid next match' and you click back button, and unfortunately you see 'real madrid football match' page)

3- i dont close my tabs. if don't use Firefox for a while (sometimes 30 minutes), when i come back, my last tab turn to start page. so, i have to click tabs symbol. after clicking tabs symbol my tab turn to normal and i can reach the website.

I use firefox as my browser of choice because it seems to be the only large browser not yet completely flooded with AI slop and bloatware. I'm incredibly disappointed that the new direction seems to be "becoming a modern AI browser". I don't care if I can opt-in or opt-out of AI tools for my personal browser experience - simply their presence presents a safety, efficiency, ethical and privacy concern.

The ONE THING that puts firefox above other browsers and why it is gaining more users recently is because it hasn't jumped into the AI-toilet along with Chrome etc. Yet. If Firefox moves forward with the implementation of more AI tools, regardless of individual opt-in options, I will have no choice but to stop using firefox. I am simply not interested in wading through excrement.

Windows 11, Thunderbird 140, How to increase the"New Event" box and its Font

- Windows 10, the size is OK

- I have 'Googled" this problem and there seems to be no answer.

Kind regards: Gary Shaw

Hi there. The Netflix homepage is no longer displayed properly. Only the headlines are visible without the thumbnails (see screenshot 1). Netflix is properly displayed in screenshot 2 which was taken in an other browser. Can somebody please help me to solve this problem. Many thanks.

Hello everyone,

like the title says, I want to set appointments in the calendar to private. I have shared calendars. Therefore, I need to be able to set some invitations to private.

In Outlook, it's no problem to set an accepted appointment to private, but in Thunderbird, this option only seems to be available for appointments I have created myself.

Starting 2026 Comcast is moving all email over to Yahoo email. We will be able to keep our Comcast email address, but as of this writing I do not know what suffix Yahoo will add to my 2 accounts. Both of my Comcast suffixes are Comcast.net and that is how my email comes through now. I was shared a linked that I didn't from Comcast about the pending change. Will the suffix change from Comcast.net? I have attached the link that was shared with me.

I guess with your Comcast e-mail, you need to know this. Comcast e-mail is going away and users are being switched over to Yahoo e-mail sometime in 2026.

Upgrade your Comcast.net email experience to Yahoo Mail

https://www.xfinity.com/support/articles/yahoo-email-migration-overview

Hello, I choose to use Firefox because it does not have the amount of bloat and spyware that exist with other browsers. I fear that the recent call to add AI to the browser's functions will both slow the processing time down as well as increase the amount of spyware involved. I cannot see how this is a positive for the future of Firefox. All I can say definitively at this point is that should AI functions be added in I will be finding a way to never use them, even if it means kneecapping things for other functionality in the process. I will also be keeping an eye out for extensions or addons that remove the AI, as I have already with other AI online.

For the last several weeks, EVERY time I use Firefox on my android(samsung) phone, I get a popup message "What do you think about Firefox" with choice of I'm having issues, or It's great. picking one it wants me to rate Firefox on the Google Play Store. but selecting the like does not take to a place on the Google Play store. and this happens every time. Does anyone know where this message originates from and how I can turn it off?

With the new terrible CEO, there are plans to start integrating AI into firefox. If this happens, I'll ditch this browser in a heartbeat. Its a terrible decision to add this and this AI bubble will burst.

I have created two profiles using the new functionality that is accessed using the "hamburger" or three horizontal lines menu. I want to open one profile at times, but the other at different times. I can only specify a default profile for initial browser start, or to have the browser make me choose each time. Either of these options mean that I have to go through extra steps to launch any profile beside the default. This effectively makes the new profiles less useful to me than the profile manager that has been around for much longer.

Searching for help online has led me to several suggestions to create shortcuts that use the -P "profile name" switch for each profile. This is out of date because the profiles I can access from the command line bear no connection to the ones I have created as described in the above paragraph. They are only the ones I have created using the (old) profile manager from the profile manager in about:settings.

Did I miss something, in other words is it possible to do something similar with the new container profiles as I can with the original config profiles?

I'm using Thunderbird in Polish language. After upgrade to ver. 144.0.1 folder names for my only IMAP account have changed into English and fonts into capital (except inbox folder name). Attached screenshot shows discribed case in red frame - capital names are in Engliś and inbox is in Polish. Below in green frame there is my POP account and folder names are correct.