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The errors I get are kind of all over the place though. I've completely deleted and reinstalled Firefox, and removed all extensions too.

It will loop to the login screen over and over, or I get the message 'An error has happened, try again later'...

I used the browser console and didn't get anything that seemed usable. I use Strava nearly every day so I'm having to use Safari. And this issue is on all of the mac and Windows systems I use. 'Troubleshooting Mode' didn't work either.

Help!

Since the last update Firefox sends the processor load through the roof. Both on desktop and on Android. For the first time since like version 7 I'm a bit disappointed.

What's up with this?

I have some websites that require pop-ups. I cannot get them to work in Firefox on my Android phone. Google searches reference a setting under "privacy and security" where I should be able to allow pop-ups in general or for certain URLs only, but I don't have that setting option.

I have Firefox version 139.4 if that helps.

Thanks in advance, Paul

Why when I view a site in a private window are the cookies saved in the cookies and site data list on the privacy and security page of my main firefox pages. I though when you used private windows no cookies or history was saved once you closed the page.

The crashing is soo repeated- that even on an individual web page- it can crash over & over; a page won't remain open more than a moment (literally) & can crash again & again.

This's across different websites.

Just started like this week.

Any suggestions? Can Mozilla fix this??

Thanks!

• After the update launching thunderbird daily, from anywhere, main `.exe` or shortcut links
• It opens a cmd prompt, I am using Windows 10 build=19041, I also use `windows terminal canary`
• I had no issues before the recent update, is there a way to roll back the version? to the previous commit?

I am new to Thunderbird and needed help to import my contacts from Outlook. It wasn't easy; I had to reorganize the CSV file to match Thunderbird's format - what a pain. Then I needed to recreate all of my group addresses using Thunderbird's tools. I used some of these newly created group addresses a few weeks ago. Now all of the group addresses exist, but they have no members. What could have happened? And, what should I do to recover their contacts?

Thank you, Stephen Thompson

Older messages in Thunderbird are listed but their content is not showing. I have been using TB forever and I never had that problem before. It is POP3. When I try Folder Repair, the program simply throws out all messages whose content is not accessible (so if my Sent folder has 40,000 messages it comes back with a Sent folder of 2,000). Clearly something got corrupted but I am not sure what. In the picture below, the header is visible but (a) not clickable (different header showing) (b) no content is displayed. I used to copy the content of the TB folder to my laptop and back (while keeping different profile names assigned during installation. The problem seems to have started when I changed profile names and began using identical profile names on both the desktop and laptop. Also, the total size of the folders is around 65Gb, in case there is a size limit. Any ideas? Thanks

Hi, I have a problem with Thunderbird tabs. I have some emails open, but after some time these emails disappear and I am left with tabs without title or content, why?

[img]https://i.ibb.co/1GzhFpNy/ThunderB.jpg/img

Tag names can be changed via message > tag > manage tags. But how can I change the tag ID ?

Let's say for example, I want to change the tag ID "unreplied" to "needsreply".

steps:

1. in user.js: change user_pref("mailnews.tags.unreplied.tag", "unreplied"); to user_pref("mailnews.tags.needsreply.tag", "needsreply");


2. search&replace all instances of regexp ^X-Mozilla-Keys:[^\r\n]+unreplied in all .eml files


3. Some tags are not stored as "X-Mozilla-Keys" inside the .eml file but elsewhere ( https://forums.mozillazine.org/viewtopic.php?t=3123346 ) – I suppose in the .msf files. They are in Mork format. Can I run a search&replace on them or will that break them?

Are these 3 steps enough or is more needed ?

Whenever a new message is received, which should go to the Local Folders\Inbox, instead a previous email from 2 days ago is always shown. I have recreated new emply Inbox and Inbox.msf files, but to no effect. Any suggestions on how to fix this?

I had set up sidebery list in my desktop computer but when i login firefox in my laptop, the sidebery list didnt appear? may i know how to do the setting to sync between the 2 devices?

Hi everyone,

We’re testing scroll-linked animations on a landing page built with Tailwind and custom JS for our client project hosted at https://noveltyads.com. Specifically, we’re exploring the ViewTimeline API and CSS animation-timeline for a horizontal scroll section.

While everything works smoothly in Chromium-based browsers, we’ve noticed Firefox behaves inconsistently in the following ways:

The animation-timeline: view() property doesn’t always trigger on scroll as expected.

Debugging with Firefox DevTools, the animations don’t appear in the Animation panel at all.

We confirmed that no polyfills or fallbacks are interfering.

This is happening on a custom-built section on this live test page: https://noveltyads.com (it’s a mock client version for internal QA — nothing behind a paywall or login).

Has anyone experienced similar behavior with Firefox’s scroll-driven animations or ViewTimeline implementation?

We’d love to know:

Whether Firefox fully supports ViewTimeline (or still considers it experimental)

Any DevTools flags or settings needed to see scroll animations properly

If there's a better way to ensure cross-browser consistency using native APIs

Thanks a lot for your help and insights!

— Usama

I am having an issue where my browser does not show the webpage title or website name when it returns results. I haven't changed anything about my browser recently and I'm really unsure of what is going on. Any advice to fix this would be appreciated.

I found that the sound produced when watching YouTube or any website that uses sound is very small, I tried to compare it with other browsers and Firefox sounds very small when compared to other browsers with the same volume and settings.