Followup from bug 759642. The Add-ons Manager is a bit inconsistent in the way it throws exceptions: * throw Components.Exception(...) * throw new Error(...) * throw Components.results.whatever Ideally, it should always use Components.Exception. See bug 746908 and bug 759642 for examples of it's usage. The relevant files are under: /toolkit/mozapps/extensions/ And some documentation on Components.Exception: https://developer.mozilla.org/en/Components.Exception This query should show where we're throwing any exception: http://dxr.mozilla.org/mozilla-central/search?tree=mozilla-central&q=%22throw+%22+path%3Atoolkit%2Fmozapps%2Fextensions%2F&redirect=true From that, it seems what's left is: * XPIProvider.jsm & XPIProviderUtils.js * Tests So it'd make most sense to have one patch for each of those bulletpoints.

Amod, did you want to work on this?

Hi Bliar, Thank you very much for asking me to work on the bug. Currently I am busy with my academics and would resume with bugzilla by 1st week of March. If you are ready to wait, I will be extremely obliged.

Per policy at https://wiki.mozilla.org/Bug_Triage/Projects/Bug_Handling/Bug_Husbandry#Inactive_Bugs. If this bug is not an enhancement request or a bug not present in a supported release of Firefox, then it may be reopened.