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A comment on Spectre mitigations murder userspace performance. Parent comment

Re:Spectre mitigations murder userspace performance by Nullabillity on Saturday June 19, 2021 @10:17AM (#27560624)
As in "it runs JavaScript and renders HTML", yes. As in "it runs stuff in a security sandbox", no.
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Re:Spectre mitigations murder userspace performance by squiggleblaz on Saturday June 19, 2021 @04:58PM (#27564412)
How about extensions? I would have thought these amount to a comparable security concern as web pages. Do they have adequate isolation?
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Re:Spectre mitigations murder userspace performance by IshKebab on Saturday June 19, 2021 @05:54PM (#27564822)
No, extensions are fully trusted. They can do anything.
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