Firefox 社群討論區

Here we go again. Apparently with this latest version 115.28 I no longer have an open new tab button on my tab line. How do I fix this and tell modifiers to stop changing things that were working fine.

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?

After updating to 143, my pinned tabs are grouped together and need to be scrolled through. There's a lot of space on the right side, which is very inconvenient. I can't find a way to disable this feature or even increase the pinned area. Green is free space, red is where you can scroll.

the last 2 times I have allowed firefox to update my computer, it moves my icloud file to trash, the last time this happened to get my icloud to work I had to reinstall the Icloud on both of my computers and then replace the files. Why does this system always want to update?

I am running the latest update for Firefox (143.0 (64 BIT) on a Windows 10 Dell laptop. Since the update on August 28th (prior update), my browser has been extremely slow, even with only one tab open. Task manager shows 95% memory usage after 15 minutes of browsing, and I have to end task on Firefox, then reopen the browser. I have run my Webroot antivirus and Malware Bytes, and my laptop is coming up clean.

I am not fond of Microsoft Edge, but I wanted to see how it performed. I have no issues with speed, so I can only guess that this is a Firefox issue.

Are there any known issues with the August 28th update?

In dem Sie das update in der bisher genutzten Sprache (Deutsch) ausliefern. Der Versuch den Firefox V143 auf Deutsch umzustellen ist mit der Auskunft gescheitert das Firefox V143 nicht mit "deutsch" kann. Wäre gut wenn sie einen Pätsch nachschieben der den Firefox in Deutsch auftreten lässt.

Firefox crashed and I restarted it and hit "Restore previous session". It started to do that, but then crashed again with a pop-up saying:

firefox.exe - Application Error A breakpoint has been reached. (0x80000003) occurred in the application at location 0x00007FFE1613B40E.

Click on OK to terminate the program

I clicked on OK. When I tried to restart, all my windows and tabs were not available and the "Restore previous session" button was gray.

Can someone fix this bug?

I prefer all my login accounts to log out when I close Firefox. All of my settings are set up to do so, nothing changed, yet suddenly for the last week or so, it has simply stopped logging me out. Every day when I log in, there everything is again. I keep rechecking all my settings, even turning them back off and on, and nothing is fixing this. What's going on?

I asked this same question in Reddit and got a reply to uncheck "delete cookies and site data when Firefox is closed", close all Firefox windows, and reopen them, and this did not correct the problem. Please advise.

your device identification does not tell me which devices you are actually identifying. You identify 4/5 devices, but I only have 2. - a new Nimo laptop (Rdn-Can68) and another relatively new Acer Nitro 50 desktop. Not sure what tag you have given for it. Previous systems failed and are gone. Some clarification would be nice!

Ubuntu - I use the SNAP version of Firefox - I generally have lots of tabs open but only use 5 or so of them and it's generally fine.... but when I am closing Firefox, it USES like 100% of the CPU and ALL of the RAM and ALL of the SWAP memory when closing.

This locks up the computer.

Sometimes it doesn't quite go all the way but I can watch it all happen in real time, using Task Manager - and that shows a solidwall of all resources occouring, when the close Firefox is run.

I am told by research via ChatGPT that this is a very real problem with the SNAP version and it's best to change to the Debian version, copy all the bookmarks etc., across and then uninstall the SNAP version.

It's rather disconcerting to have Linux crash because of this one app locking it up and frequently.

Chat GPT:

Is there a problem with Firefox Snap Version closing and using all the resources while doing so, which results in locking up the computer?

You're definitely not imagining it—there have been reports of Firefox's Snap version consuming excessive system resources (CPU, memory) and even causing lockups or hangs, particularly during closure. Here's what’s going on and how to mitigate it:

What’s Happening with Firefox Snap?

2. Browser Hangs or Locks the System on Close

On Linux (especially Ubuntu), users have reported that closing Firefox can lead to it hanging in memory, sometimes unresponsive and still consuming resources.
Super User
Ask Ubuntu
A stark example from Reddit illustrates the severity:
“About 50% of the time I open Firefox, it'll reach 100% CPU usage in about 30 seconds… PC completely unusable unless I shutdown.”
Reddit

3. Known Wayland Sway Bug

On Wayland/Sway setups, reloading Sway while Firefox is open can trigger intense logging, causing high CPU use and an enormous syslog.
Fix: Set MOZ_DISABLE_WAYLAND_PROXY=1, or upgrade to FF 125 where the issue is addressed.
Reddit+1

Alternative Approach

Many users, particularly on Ubuntu, opt out of Snap completely in favor of the .deb package or PPA builds. These alternatives often avoid these specific issues. Ask Ubuntu Reddit

Thoughts? Solutions?

Thanks in advance.

If I have vertical tabs enabled, and tabs sidebar uncollapsed it will unexpectedly change to collapsed if I reorder a tab via drag and drop. See attached gif.

Firefox 143.0 (aarch64) MacOS Sequoia 15.6.1 (24G90)