Puntuado con 5 de 5 estrellas

Solving for FF4:

1. Rename the extension xpi > zip
1. Unzip the renamed file
2. Open with texteditor: install.rdf
3. Edit Line 20: 3.6 > 4.0
4. Save
5. Zip the complete summary
6. Rename the extension zip > xpi
7. Install the extension in FF4