- Download latest firefox from here
- Untar firefox by
tar -jvxf firefox-35.0a2.en-US.linux-x86_64.tar.bz2
- Run firefox (Go into the uncompressed folder and run “firefox” file)
- Once the firefox is open, go to Tools → Web Developer → WebIDE
- You can also press Shift+F8 to open the WebIDE.
- Once you do that, WebIDE will appear.
- After installing firefox and opening the WebIDE, click on the “Select Runtime” and then “Install Simulator”