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Very infrequently, Firefox starts processing all inputs or actions with a ~10s delay

Firefox App responsiveness
felix.s
felix.s

Every few weeks at random I have the same problem: Any action I take on tabs (e.g. close tab, open new one), as well as any typing I perform, only creates the normal effect after around 10s of delay. I can type whole sentences and nothing happens until 10s later the whole sentence starts appearing as if I had just typed it. The hamburger menu and about dialog where not impacted from this delay.

The CPU and memory load shows no signs of being a bottleneck and nothing performance hungry is happening in the rest of the system.

This happened around 2min after startup, after 5h of work, or anywhere in-between.

Workaround is a browser restart, but it is quite annoying if this occurs while I'm filling in a form and I have to start over.

Ubuntu 24.04 - snap package Once the issue occurred, I disabled all extensions (without restart), but the issue continued.

Every few weeks at random I have the same problem: Any action I take on tabs (e.g. close tab, open new one), as well as any typing I perform, only creates the normal effect after around 10s of delay. I can type whole sentences and nothing happens until 10s later the whole sentence starts appearing as if I had just typed it. The hamburger menu and about dialog where not impacted from this delay. The CPU and memory load shows no signs of being a bottleneck and nothing performance hungry is happening in the rest of the system. This happened around 2min after startup, after 5h of work, or anywhere in-between. Workaround is a browser restart, but it is quite annoying if this occurs while I'm filling in a form and I have to start over. Ubuntu 24.04 - snap package Once the issue occurred, I disabled all extensions (without restart), but the issue continued.