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It is my custom to run spell check after typing an email. Today, sudenly, the write window hangs when I click on spelling. Does not happen in troubleshoot mode. I have no extensions installed and default theme. I did try disabling hardware acceleraton, but did not help.

Yesterday all workd OK, and thre have been no changes to the computer snce.

Title: CardBook 104.7 folder pane frozen ~40 minutes at every startup - TB 140.8.1 ESR - Linux Mint 22.3

Environment: - Thunderbird: 140.8.1 ESR 64-bit - CardBook addon: 104.7 - OS: Linux Mint 22.3 Cinnamon 64-bit - Fresh install of both Thunderbird and CardBook - 3 Gmail IMAP accounts - 5 CardBook address books, all local FILE type (.vcf files in /home/nesko/cardbook/), no CardDAV or remote server involved. Largest address book has approximately 1500 contacts.

Symptom: At every cold startup, the CardBook folder pane (address book list) is completely frozen and unresponsive for approximately 40 minutes. Thunderbird itself starts quickly and all email accounts and other addons function correctly. Only the CardBook folder pane is affected. After approximately 40 minutes CardBook becomes responsive without any user intervention.

Error console output at startup consistently shows: - TypeError: can't access property "addEventListener", currentWindow is null (implementation.js:28:13) - TypeError: can't access property "document", currentWindow is null (implementation.js:567:15) - CardBookXULNotifyListener.js:599:13 - Content process is not responsive while sending DevToolsProcessParent:watchTargets

Additional observations: - On one startup, 8 duplicate CardBook tabs appeared simultaneously when TB's content process finally became responsive, suggesting CardBook was retrying initialization multiple times while waiting for TB's window - Running TB in Troubleshoot Mode (all addons disabled) confirms TB itself is healthy and starts quickly - The errors reference CardBook's own initialization code (CardBookXULNotifyListener.js) attempting to access Thunderbird's window (currentWindow) before it is fully ready - TB's content process unresponsive message appears during the same startup window

Steps taken so far: - Unchecked "Keep messages in all folders" in Synchronization & Storage for all 3 IMAP accounts — this improved overall TB startup time - Unchecked "Run synchronization at Thunderbird startup" in CardBook Preferences → Sync — this reduced the CardBook freeze from over 1 hour to approximately 40 minutes - Reported to CardBook developer at cardbook.thunderbird@gmail.com

Question for TB support: Is there a known issue with TB 140 ESR's content process initialization timing that could cause addons to fire before TB's window is fully ready? The currentWindow is null errors suggest CardBook is initializing at a point where TB's window object does not yet exist. Is there a TB-side fix or workaround for this timing issue?

Naturally, I am not sure, which topik summarise my problem the best, so, I ask the question here. I found out that Mozilla browser takes a lot of memory in my smartphone (like no one app else). Cleaning up the cache didn't help much, because the most part of memory is taken by the "user data". Please tell me what exactly is it, what parts it consists of and how to clean it avoiding the ability to remove anything important. Thank you for the fast answering and for operativity Korwin

I own two computers running MacOS 10.15.7 Catalina and have Thunderbird installed on both. Until rather recently, the Thunderbird version was 140.8.1. Then I noted that it was impossible to send e-mails, and soon discovered that the cause was outdated server settings. They could not handle office365, so I installed Thunderbird 148.01 and changed to settings that should be able to do so. This worked very well on one of the computers, the one which has a fast (SSD) hard drive, but not on the other that has a slow (non-SSD) drive. The error message that I get with the slow computer is, surprisingly, the same as I got with the older Thunderbird. But I suspect that the real cause is some kind of timed-out process.

If any of you could explain what happens and tell me what to do, I would be very happy. Maybe I should choose a Thunderbird version somehere between 140 and 148?

Helge Malmgren

this used to work (like last week) Upgraded macos. Mozilla. please fix

command shift ~ (to switch firefox windows) does not work with FF 148.0.2 (aarch64), MACOS 26.3.1 (25D2128)

Dear Mozilla.

Yes, I'm using the dreaded Windows 10, I do understand it's at end-of-use, however this prob's been happening for ages. It's just got a little worse lately! (I've also got another hard drive with Windows 7 on it I swap the Windows 10 drive for sometimes. And we don't talk about the Windows XP hard drive with my music software on it. AARRRGGGHHH!!!! But the everyday drive with this problem is definitely Windows )

I don't use masses of extensions, just a VPN (which is there but not used a lot!) and is Proxy VeePN (that's its name, blame the designers, not me!) When I'm NOT using Firefox for a few moments, I hear the fans speed up, the hard drive spins like it's about to take off (old computer here!) The moment I touch the mouse, the fans all slump back to normal and the red 'HIGH USAGE' mark against Firefox vanishes back down to 'LOW'. Which makes it annoyingly difficult to analyze what's happening cos the moment I touch the mouse to find out what's happening, it stops happening!

Despite the above and its memory addiction - left to itself it munches memory like me with a crate of chocolate bars! - I do love Firefox best of all the browsers. I kinda know what causes the memory problem, by the way. I don't know all the techie terms but here's what's going on. Imagine you've got a house with an untidy kid in it. Every time one room gets too messy to use, you move into the next room. Eventually you run out of rooms. Then you restart the house back from day one, all the rooms are tidy again and you can use them all individually and happily - until Untidy Kid turns back up!

I'm on Firefox 148.0.2. If you've got any ideas about the CPU usage, I'm [email removed]@hotmail.com. It doesn't seem to matter what websites I've got in the browser, it just does this when I've got it parked in the background, it's like it's twiddling virtual thumbs through boredom cos it's not being used.

Yours respectfully,

Chris.

My Samsung Galaxy S24 Ultra keeps reporting that "Firefox is using too much battery in the background. Put it in deep sleep to extend your battery life.". I have set background battery use to "restricted"and disabled background data. I don't want to put the app into setup sleep because then it will no longer be the default web browser.

Hi. I access a gmail account via Thunderbird. It's generally quite efficient, but recently it has become very sluggish. I have pretty fast internet, wired at 1G, so usually my mail appears almost immediately. In the last week or so it has slowed down dramatically, sometimes requiring multiple login attempts. Any idea what's going on? Thanks. Steve

I have used Thunderbird for many years and and have loved it. However, recently my "Local Folders Inbox" have been extremely slow (deleting emails, reviewing an email, etc.). I have tried every suggestion that I have found without any change: reducing emails in the folder (down to about 75 remaining), compacting and repairing the folder, deleting and rebuilding all of the msf files and global database, disabling all addons, empty trash and junk, clear the cache, disable hardware acceleration, exclusion in antivirus, etc. It has become very frustrating. Any suggestions would be greatly appreciated.

When opening Thunderbird on Wayland with Nvidia drivers it breaks other apps. Specifically Spectacle, KDEs screenshot tool. I am here to help supply any logs or error reports to help fix this.

Debian 13 with KDE

Nvidia 590 drivers

Wayland session

I posted this question some time back but didn't receive any helpful answers and don't know where my post is. In the upper right-hand corner there is suppose to be 3 symbols. One to lower the app, one to make the app full screen or partial and one with an X. I have jumbled symbols where the 3 good ones are. It does it in trouble shoot mode. I tried disabling addons but I can't get the normal symbols back. Here's what it looks like... Thank you for any help.

When I use picture-in-picture for any video, all of my firefox browser windows go unresponsive. I can move the cursor around, but it won't allow me to click on anything. The only way to stop it is to open a brand new window which makes it responsive again and then close out of the PIP video. Sometimes it lets me go back to using the browser as normal, and other times it causes all firefox windows to crash. I'm using Windows 10. This issue only began happening about 10-ish days ago.

The Crash Report IDs are: bp-42f92617-671a-4e30-9d32-e1def0260302 bp-64cb35b0-5ab7-4b9d-8a80-7d2470260302

Tbird (v16. 1) for android installed on my Pixel 9a connected to my gmail account. Gmail client runs perfectly connected to same account while Tbird starts with a blank screen i.e no messages. App appears to be frozen but later displays messages. General operation seems sluggish - enough to turn me back to the Gmail client (which I don't like) but at least I can navigate my email without waiting. Any suggestions please?