参考自： http://stackoverflow.com/questions/13132794/firefox-add-on-restclient-how-to-input-post-parameters
If you want to submit a POST request
- You have to set the “request header” section of the Firefox plugin to have a “name” = “Content-Type” and “value” = “application/x-www-form-urlencoded”
- Now, you are able to submit parameter like “name=mynamehere&title=TA” in the “request body” text area field