Extremely useful - there is nothing similar Rated 5 out of 5 stars

Great add-on.Using it to auto-replace 2000+ search strings (phone numbers) to show me real names when reviewing my phone bills in browser.The only alternative to this is a Greasemonkey script (Replace text in webpages) that for me (and others) as of July 2013 somehow does not work any more. So I switched to this plugin, which is way more powerful (limit autoreplace to certain domains/sites, etc. etc.

This review is for a previous version of the add-on (