1921870 - Consider to associate a SUMO page learn more link to the about:addons messagebar shown on "incompatible add-on"

Status: NEW

(Toolkit :: Add-ons Manager, task, P3)

Description

[Luca Greco [:rpl] [:luca] [:lgreco]]

While refactoring the messagebar associated to each addon card in the about:addons page, we have noticed that the messagebar shown on incompatible add-ons (which is the one using the localized message with fluent id details-notification-incompatible2).

As an additional side note, Thunderbird is extending this message bar (quoting my comment added to https://phabricator.services.mozilla.com/D222365):

Thunderbird is injecting when own aboutAddonsExtra.js script into their about:addons pages and as part of that aboutAddonsExtra.js script they are setting a custom (non SUMO) link to the incompatible message bar (see here). This Thunderbird customized messagebar did hit an issue when we migrated to fluent id (Bug 1773568) and we ended up adding this one back (https://bugzilla.mozilla.org/show_bug.cgi?id=1773568#c4)

The link that Thunderbird is injecting isn't a SUMO page, and so we may have to account for that Thunderbird special case when we will be adding a SUMO page link to this messagebar in Firefox, while Thunderbird may want to include a non-SUMO link in the same messagebar.