Prevent add-on from breaking when Facebook updates

[WesleyBranton]

Currently, changes to Facebook frequently break some or all of the add-on's functionality. This is because the framework that Facebook uses appears to use randomly generated classes and IDs, which seem to change often and breaks the CSS that the add-on is using.

If possible, it would be cool if there was a better way to deploy CSS changes to the add-on or, better yet, a way to prevent the add-on from breaking when there are changes.

[h7io]

So you can match the HTML elements a bit more reliably by searching for the aria-label properties. For example, the reactions on posts have aria-label="See who reacted to this" on the English localization, so a css rule span[aria-label="See who reacted to this"] {} would match it.
But it is a bit too "inner" and does not match everything needed. A few parent DIVs would be better off to be removed, but since CSS does not have a parent selector - I imagine it could only be implemented with JS traversal, i.e. search by the aria first and then go up the hierarchy to remove the parents.
And also, it is localization-specific, so some way to gather all the localized aria texts would be needed.

Regardless, great add-on!