Add ability to use -1 to only disable on shutdown
Update description: -1 to only disable on shutdown
Update changelog: -1 to only disable on shutdown
Add support for Gecko 2 - 9
(was wrong Gecko 11+: chrome.manifest works since Gecko 10)
Mark compatible with Gecko 33.0a1
Add link to documentation to template generator output
Template generator: use Services.jsm
Update changelog: support for Gecko 2 - 9
Bump version to 0.1.0b1