No longer working on Firefox #2
Description
This extension has just stopped working on Firefox with a tab.title is undefined error.
Fix is simple, just change
if( (tab.title.toLowerCase()).search(keywords[i]) > -1 ) { return true; }
to
if( 'title' in tab && (tab.title.toLowerCase()).search(keywords[i]) > -1 ) { return true; }
Sorry, don't have time to do a PR.