Revert "Merge branch 'master' and fix"

This reverts commit 0dc333acaa978f4659544f34ac1428f46ffc5988, reversing
changes made to 3f332552021a1bc828a58debc9cde676c6235fc5.
Revert "standardize script injection on banlist.js"

This reverts commit 3f332552021a1bc828a58debc9cde676c6235fc5.
Revert "add Safari Extension loading check to script injection"

This reverts commit ceec23ba8231c6e6fa648446562761ee6a97221f.