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Utter Disappointment with Firefox Performance

Dear Mozilla Team,I am writing to express my deep frustration with the current state of Firefox browser. As a long-time user, I have been relying on Firefox for my daily browsing needs, but recent updates have completely ruined my experience.The situ...

Thunderbird 140.0.1esr (64-bit) Causing High CPU Usage and Overheating on macOS Catalina

Hi everyone,I recently updated Thunderbird to version 140.0.1esr (64-bit) on my MacBook Pro running macOS Catalina, and I've encountered a serious performance issue since the update.Issue Summary:After launching Thunderbird, my MacBook's fans ramp up...

Goodbye forever, Firefox

Today's crash cost me an hour of work.Last week's forced reboot in the middle of a web conference call cost me reputation. Same issue earlier in the week took out a lot of tabs I needed preserved. Constantly refreshing in the middle of reading someth...

Random Page Crash

As of today, 10/02/25, I have had 6 page crashes during this single day. Is there something out there that is causing this, or should I revert to an earlier version of Firefox?

Non Reponse while scrolling news sites

Recently I have been getting "Firefox Not Responding" when I'm scrolling news stories on sites like New York Times, New Yorker, Atlantic , etc. What is wrong?

Here's my list of recommendations for the Firefo'x browser

1. Add vertical tab function and tab grouping function. Someone made this proposal in 2022 and got support from hundreds of people, but you haven't developed it yet.2. Modify the default settings of Firefox to improve privacy and security. Specific m...

How can I disable the damned new tab page that opens everytime when I start Firefox?

How to stop Firefox from opening a new tab page when launch it??? Damned!!!

Manually Organise Bookmark Folders in Toolbar

I don't seem to be able to do this anymore. Has something changed?I used to be able to drag and drop either bookmarks within a folder, or drag and drop bookmark folders to rearrange the order so I could keep a folder that I'm currently using in an ea...

Thunderbird mobile with a outlook email address

Does thunderbird mobile work with a outlook email address? I am trying to add but without success. Tried with the app password, still does not work.

When using Firefox and Hotmail for emails, no undelining of incorrect spelling in emails

I have used Firefox for many years with Win 7, now I upgraded my PC to a new Win 11 PC, and since then, when writing an email in Hotmail, it no longer underlines miss spelt words. I Googled the problem and did everything in windows and in Firefox, I ...