Rated 4 out of 5 stars

good extension.

missing features:
1. save requests so they can be re-used (and edited) later
2. stop button
3. adding request headers is cumbersome. why not just write it in a text area? writing: 'Content-Type: text/xml' (without the quotes) means only an addition of ':' in place of mouse click and 2 tabs. Editing, copying, deleting is then a lot easier
4. request history - would be nice to see each response
5. maybe have request prototypes. e.g., if i'm querying a service i may have several resources i'm querying. then i'd like to be able to change one parameter (e.g., server name - qa/dev) and have all queries update automatically

This review is for a previous version of the add-on (1.2.9).