To install the APEX Developer Addon you need
or Google Chrome.
At next go to the Download Section, request a Download and wait for the Email.
In the Email you'll find the Download Link
The download is a zip file containing a Firefox and a Chrome version of the Browser Addon. Unzip the File and drag the .xpi-file into Firefox or the .crx-file into Chrome.
Please don't forget to report Issues and Feature Requests.
Special Google Chrome Note!
Google recently made the Chrome Browser more "secure" and doesn't allow drag&drop installation of Addons directly anymore. Instead try this:
- Go to the Menu -> Window -> Extensions
- activate "Developer Mode" checkbox in the top right corner
- drag&drop the downloaded .crx-file onto the Extensions Page