Multiple ruleset library loads during startup
Mike, the current version of https everywhere in git master loads the ruleset libraries three times (!). I think that's possibly because the nsPref:changed Observer added here is firing during startup, in addition to the on-profile-after-changed event we already had. Note that this is the case even though I did this.
This is a blocker for the next dev release.
To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information