Right-click to open extension options
Used code from https://github.com/Infocatcher/Custom_Buttons/tree/master/Toggle_Restartless_Add-ons
Don't load AddonManager.jsm, if there is lasy getter
(see chrome://browser/content/browser.js)
Bump version to 0.3.0pre6 - 2014-02-18
Install page for v. 0.3.0pre6 - 2014-02-18