I meant to say Firefox GPU using too much % of CPU since latest version, MacBookPro overheating for the first time

Hi there! This [https://support.mozilla.org/en-US/kb/firefox-uses-too-much-memory-or-cpu-resources page] should help with your problem!

Thanks much, i appreciate your response. I've done most of those, it's curious this problem only started recently, and it doesn't happen with other browsers. Attached s/shot is what it looks like with only 1 page (Google Ads) open in Firefox 150.0.1. Wondering if Firefox added a/i or something that's now using CPU.

One other thing i could recommend is a fresh install of firefox. Certain Firefox problems can be solved by performing a ''Clean reinstall''. This means you remove your Firefox program files and then reinstall Firefox. This process does not remove your [[Profiles - Where Firefox stores your bookmarks, passwords and other user data|Firefox profile]] data (such as bookmarks and passwords), since that information is stored in a different location. To do a clean reinstall of Firefox, please follow these steps: '''Note:''' You might want to print these steps or view them in another browser. #Download the latest Desktop version of Firefox from [https://www.mozilla.org mozilla.org] (or choose the download for your operating system and language from [https://www.mozilla.org/firefox/all/ this page]) and save the setup file to your computer. #After the download finishes, close Firefox. #*'''Windows:''' Click the Firefox menu [[Image:Fx57Menu]], then click "Exit". #*'''Mac:''' Click the Firefox menu at the top of the screen, then click "Quit Firefox". #*'''Linux:''' Click the Firefox menu [[Image:Fx57Menu]], then click "Quit". #Delete the Firefox installation folder, which is located in one of these locations, by default: #*'''Windows:''' (Note: Check both folders.) #**C:\Program Files\Mozilla Firefox #**C:\Program Files (x86)\Mozilla Firefox #*'''Mac:''' Delete Firefox from the Applications folder. #*'''Linux:''' If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see [[Installing Firefox on Linux]]. If you downloaded and installed the binary package from the [http://www.mozilla.org/firefox#desktop Firefox download page], simply remove the folder ''firefox'' in your home directory. #Now, go ahead and reinstall Firefox: ##Double-click the downloaded installation file and go through the steps of the installation wizard. ##Once the wizard is finished, choose to directly open Firefox after clicking the Finish button. More information about reinstalling Firefox can be found [[Troubleshoot and diagnose Firefox problems#w_4-reinstall-firefox|here]]. <b>WARNING:</b> Do not use a third party uninstaller as part of this process. Doing so could permanently delete your [[Profiles|Firefox profile]] data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. <u>These cannot be easily recovered unless they have been backed up to an external device!</u> See [[Back up and restore information in Firefox profiles]]. <!-- Starting in Firefox 31, the Firefox uninstaller no longer lets you remove user profile data.Ref: Bug 432017 and https://support.mozilla.org/kb/uninstall-firefox-from-your-computer/discuss/5279 [Fx31] Windows uninstaller will no longer offer the option to remove personal data --> Please report back to say if this helped you! Thank you.

Thanks, I did that and re-tested with just the google ads page, GPU only 398% for a couple of seconds, then down to 1 %. Then I tested with 10 pages open, no issues. I appreciate your responding so quickly! I'll check back if issue comes back.

Glad I could help!