Upload extension to AMO

[da2x]

Please upload Flattr to Mozilla Add-Ons (AMO).
https://addons.mozilla.org/firefox/extensions/

Advantages:

• free promotion for Flattr to users who’re already familiar with and are actively looking for new extensions
• free promotion for Flattr inside Firefox to users of similar extensions to those who install Flattr (coming later this year)
• free promotion for Flattr on AMO next to related plugins (“people who install X also install Flattr”)
• synchronize installs with Firefox Sync/Account (FXA) so the extension is auto-reinstalled when people get a new computer
• you can still distribute the same version of the extension yourself plus on AMO (same signing process as today)
• synchronize opt-ins and settings with storage.sync (limited to 100 KB)

Disadvantages:

• None. 🎉

[ThomasGreiner]

The upload itself, at least manually, shouldn't be a big deal. Although we probably need to take care of more than that:

1. Adapt existing upload logic to automate deployment.
2. Ensure that only release builds are uploaded to AMO.
3. Ensure that existing release-build users are properly being migrated.

@fhd What do you think? Presumably, (1) in combination with (2) could cause issues since we wouldn't notice an issue with the release upload logic until we do a release since it'd differ from the one we use for non-release builds.
Also, I assume that we'd still want to upload release builds to our server regardless.

[fhd]

I'd have to check (a bit short on time these days), but I'm pretty sure we already have the extension on AMO, or what are we pointing users at? Maybe we just need to get the profile in order and make it visible?

[da2x]

Any progress on this?

@fhd it's being signed by uploading it to AMO but there is no listing on AMO. Users have to download the extension directly from Flattr.com.

It should just be a matter of logging into the AMO Dev Portal and enabling the listing. (It can still be distributed outside AMO as well.)