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by Zren 1970 days ago
I'm surprised they didn't get the statistics for how many people went forward within 1-5 seconds of a Backspace press to undo it.

It seems they saw that the ratio using Alt+Left (2M) and Alt+Right (0.5M) was different to Backspace (40M) and Shift+Backspace (0.3M). However it makes sense a single key shortcut is more discoverable. The first time it's hit might be a mistake, but the following times might be on purpose.

https://bugzilla.mozilla.org/show_bug.cgi?id=1041377#c27