Rated 4 out of 5 stars
bug: "create barcode from selection" correctly handles only ASCII characters, but ignores the rest (try cyrillic chars here http://www.ukr.net/ua/ for example). Please, fix this!!! Your extension is the best.
Other addons that add icons in status bar (like firebug, adblock, etc) usually has ability to add one more icon on toolbar (in toobar customize mode). It's useful because I used to hide status bar to save more space but still have access to icons via toobar. Your addon doesn't available in the list of draggable icons, so each time I need to send URL to iPhone I have to unhide status bar. :(