https://bugzilla.mozilla.org/show_bug.cgi?id=1815017
1815017 - Add nimbus setPref variable to feature manifest to support pdfjs feature callout
RESOLVED (jprickett) in Firefox - Messaging System. Last updated 2023-02-08.
addnimbusvariable
https://bugzilla.mozilla.org/show_bug.cgi?id=1883646
1883646 - Migrate abouthomecache to use setPref instead of isEarlyStartup
RESOLVED (brennie) in Firefox - Nimbus Desktop Client. Last updated 2024-04-16.
migrateuseinstead
https://lists.gnupg.org/pipermail/gnupg-users/2002-November/015947.html
Setpref on RSA key in 1.3.0 knocks over W2K
rsakey