Load https://reviewboard.mozilla.org/r/64314/diff/2#index_header and you get a slow script warning. Reproduces in fresh profile and in nightly and 45. It never seems to recover.
what's causing this is the size of the patch: 111,141 insertions; 8,163 deletions. we should catch when a diff might be too large to review (i suspect experimentation will be required to find the right value), and instead show a link to the raw diff (https://reviewboard-hg.mozilla.org/gecko/raw-rev/85572a505fb2 in this case).
Summary: slow script dialog → improve handling of massive diffs (avoid slow script dialog)
Almost certainly a dupe of other dependencies of this blocker, but we'll sort that out later.
Dupe of bug 1288125?
You need to log in before you can comment on or make changes to this bug.