Argh. Firefox 26 has a bug that makes it much harder to detect history.state support: https://bugzilla.mozilla.org/show_bug.cgi?id=949471
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@MekahimeAkari @lifning "C makes it easy to shoot yourself in the foot; C++ makes it harder, but when you do it blows your whole leg off". -- Real Stroustrup quote, 1986
Chekhov's repro: If a line of code is included in a bug report, it should contribute to the debugging somewhere.
"After I linked difftastic, one of my friends immediately used difftastic to find a stealthy bug, five stars!"
https://www.scannedinavian.com/tools-built-on-tree-sitters-concrete-syntax-trees.html