Do a full reload when tab is restored #978
Merged
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Firefox has weird tab restoring logic. When you, for example, Ctrl-Shift-T, it opens a kinda broken cached version of the page. And for some reason this reverts the CM state. Seems like manipulating Preact state is unpredictable, but sessionStorage is saved, so we use a random token to detect if the page is being restored and force a reload.
Fixes #919.