Commits 4be76cf: frame src override fix for index selection (Robert Castles) #1505 b6eca15: remove frame url fallback matching code, no longer needed (Robert Castles) #1505 88b1f92: re-implement URL fix for finding iframes (Robert Castles) #1505 43be137: hide url workaround behind a pref (toddtarsi) #1505