Currently we support running the about:addons UI in both a standalone window, and also in a browser tab.
Firefox has only used the latter for many years, but we've continued to maintain tests for both, which increases both our maintenance burden and also the time it takes tests to run. This removal is being tracked in bug 1349723. -rhelmer _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
