Hello,

I am reporting a performance issue specifically related to Google Search's AI features (AI Overviews) in Firefox 149.0.2 on macOS.

The Issue: When an AI-generated summary appears in Google Search results, GPU usage spikes significantly, reaching up to 212%. This causes the laptop to overheat and triggers high fan speeds.

Critical Comparison:

Firefox 149.0.2: Extreme GPU load and performance degradation when rendering Google AI elements.

Google Chrome 147.0.7727.56: Works perfectly with normal GPU usage under the same conditions.

Tested on two different MacBooks: MacBook Pro (A1502), 16GB RAM, i7 (2015) — OS: macOS Monterey. MacBook Pro (MMQX3), 64GB RAM, M1 Max (2021) — OS: macOS Sequoia (15.x/Tahoe).

I have tried all suggestions from the "Firefox is already running..." page but could not fix the problem.

I don't know if this is a problem, but I have several profile folders (see image). The top one is empty, but two folders below that one, are 2 GB or more in size.

Should I delete some or any of them?

Regarding the new built in Firefox VPN. If I have Tabs open and Enable the VPN on a New Tab, does it then affect all previously opened Tabs, only the New Tab, only the New Tab and Tabs opened after that initial New Tab, or ? Also, is there a Meter Display or similar so I know how much of the 50GB VPN allotment has been used or is remaining ? Thank you, very kindly ...-- J V

Setup: macOS Tahoe (26.4) and Firefox 149.0

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Behavior: Out of the blue this morning, every website I try to visit in Firefox returns "Looks like there’s a problem with this site". Every other browser works fine.

Things I've tried, that haven't fixed it: - Ruled Out DNS: Sites like 1.1.1.1 and my home router's IP return the same issue in Firefox, but also resolve in any other browser. - Firefox Safe Mode: no fix - Deleted All Settings, Reinstalled Fresh: - Removed the Firefox App, deleted:

       - ~/Library/Application\ Support/Firefox
       - ~/Library/Caches/Mozilla
       - ~/Library/Caches/Firefox

...and then downloaded and installed 149.0 fresh. - Refreshed Firefox (via [link] - about:preferences (toggled between FALSE and TRUE, testing each time) via this YouTube video

- network.dns.disableIPv6

- network.dns.disablePrefetch
- network.dns.disablePrefetchFromHTTPS
- network.dns.disable

....and in desperation, I checked my Mac for Malware (clean)

I'm at a complete loss: every other browser works, but Firefox is a 100% fail for all websites. Any thoughts?

I am experiencing significant stability issues with Firefox. When I use YouTube, the entire browser frequently hangs (becomes unresponsive) and eventually crashes. This does not happen on all websites, but it is consistent when playing video content on YouTube.

• Symptoms: The browser "stacks" or freezes completely; I cannot click tabs or menus until the browser finally closes/crashes.

• Extensions: I am currently using extensions like SponsorBlock, uBlock origin. I am unsure if this is the cause, but the issue persists during video playback.

• Hardware: I am running this on a laptop with an 16gb 4800mhz RAM, i7 12th Gen processor and an RTX 3070 GPU.

1. Is there a known compatibility issue between current Firefox builds and SponsorBlock or similar video-modifying extensions?

1. Could this be related to hardware acceleration settings with my NVIDIA GPU?

1. What steps should I take to provide crash logs to help identify the root cause?

Went to do something on a website, saw that I had been logged out, went to log in and it didn't auto-fill. Went to check the password but seemingly it isn't saved anymore.

The problem lies in the fact that I signed up with an email mask, used a random password and I can't get a recovery email sent to it. So am I perma locked out forever?

I'm just confused on how the saved password can disappear? Any help?

Default homepage is yahoo. Since the update to version 149, if I do a search from yahoo, the new tab that opens with the search result is blank most of the time. I have to click reload for the search results to show up.

Is anybody else having that problem? Seems to be yahoo search specific but not 100% sure.

Dan

Since the most recent update installed on Firefox, my homepage no longer loads on opening the browser. Instead, a blank page loads, and I have to hit the home button in order to get to my home page. I've checked and none of my settings have changed, so don't see what else it can be other than some kind of bug?

I read magazines using PressReader on Firefox but during this the window keeps getting refreshed. When this happens I end up back at the beginning of the magazine instead of on the page I'm reading. It's becoming almost impossible to read the entire magazine.

What I can't work out is what is doing this? Is there a Firefox setting that I need to change?

There seems to be no settings in PressReader.

I'm running Firefox on Win 11 Pro if that is relevant.

Hello All,

I'm using Firefox (149.0.2 snap) with LUbuntu 24.04.4 LTS. Because of a wrong graphic driver, I had to turn off hardware acceleration in FF.

When FF is started the Initial "Firefox - Choose User Profile" is unreadable (see attached : wrong_screen.jpg), but if I continue (click somewhere in the window) , all the opened tabs are readable.

Once in FF, if I want to select another profile from the application menu -> .. -> manage profiles, then the "Choose User Profile" window is fine (see attached : good_screen.jpg).

I tried to start FF with the "-P" option to specify wanted profile but it continues to start with the unreadable "Choose User Profile" window.

Could someone give me a solution, except finding the good hardware driver for my computer?

Thanks Bouilla.

Issue: Rapidly scrolling up or down often creates an unintended blank space (margin) at the top or bottom of the tab list.

Symptom: When this gap appears, the mouse cursor's focus becomes misaligned with the actual tab selection point by the height of that gap.

Behavior: Scrolling back toward the gap usually forces it to disappear, which also restores the correct alignment between the cursor and the selection point.

Reproducibility: The exact trigger is inconsistent. While it happens most often during fast scrolling, it sometimes occurs during slow scrolls as well. The frequency is unpredictable—sometimes occurring every time, and other times once in five attempts.

I just lost ALL my open tabs AGAIN!!! This's the 3rd time !!!!! Restore previous tabs IS NOT IN THE Menu > History AGAIN per Mozilla's method!! Frankly, I'm tired & overwrought this keeps happening WHEN IT'S NOT SUPPOSED TO!!

Now what cor-el?? I certainly hope you've a corrective answer. dCβ (;>{

The Cache is never cleared after clearing, there are always about 9,3 MB left. According to my settings there should be 0 MB left. (When I check the Task Manager, Firefox ist always opened up to 10 times.) How can I make sure the Cache is completely cleared? I added Screenshots of both. Thnx for helping...

I set the bookmarks toolbar to show in new tabs only. If I then press Ctrl-Shift-B in any tab I lose the functionality of having the toolbar show exclusively in new tabs. It either shows in all tabs or in none, depending on the number of times I press Ctrl-Shift-B.

I need help with annoying pop-ups. I followed instructing. It only say allow, not block, when I go to settings, security & privacy, checked block pop-ups and third party redirects.