Check about:support and look for a number higher than 0 in the "Multiprocess Win... | Hacker News

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n72 on Nov 13, 2017 | parent | context | favorite | on: How Firefox Got Fast Again

Check about:support and look for a number higher than 0 in the "Multiprocess Windows" entry. Old extensions or something may be keeping you from running multi-process.

bjterry on Nov 13, 2017 [–]

I have a 1/1 there, and the only extension I have loaded is the new version of Tree Style Tabs.

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