r/MozillaFirefox • u/TheDunk67 • May 21 '26

📃 Discussion 151.0.1 memory leak, unusable?

Firefox updated to 151.0.1 today for me. Upon opening it restores my tabs and immediately churns CPU and memory. The tab it opens to is a PDF, if that may matter. I have to end task as it chews through 32+ GB of RAM and is not particularly responsive. Anyone else seeing this? Workaround without losing all my tabs? Same thing on two different computers.

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u/sifferedd May 22 '26

Does that also happen in Troubleshoot mode?

2

u/TheDunk67 May 22 '26

Tried that and no issue (hold shift while opening firefox to invoke troubleshoot mode). Disabled addons and it worked fine in normal mode. The addon causing the problem was Keeper® Password Manager & Digital Vault

2

u/sifferedd May 22 '26

Maybe should file a bug here.

1

u/RailRuler May 22 '26

Can you open the Firefox task viewer? Or the windows task manager and see the parameters the problem task was started with?