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High CPU usage on semaphore.social.

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Semaphore.social is a mastodon/fediverse web client. I've been using it without issue up to now and it has not updated recently.

After a few hours running the CPU usage of Firefox becomes very high (25-50%) and the about:performance shows that it is due to this tab, which shows at values from 110 to 160% or thereabouts.

I haven't noticed this before updating to Firefox 134.0 so I suspect it may be a Firefox regression.

However I cannot work out what the cause is, how to fix it, or if I should file a bug on it.

Any ideas on how I can fix this?

Semaphore.social is a mastodon/fediverse web client. I've been using it without issue up to now and it has not updated recently. After a few hours running the CPU usage of Firefox becomes very high (25-50%) and the about:performance shows that it is due to this tab, which shows at values from 110 to 160% or thereabouts. I haven't noticed this before updating to Firefox 134.0 so I suspect it may be a Firefox regression. However I cannot work out what the cause is, how to fix it, or if I should file a bug on it. Any ideas on how I can fix this?

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