https://github.com/gorhill/uBlock/releases/tag/1.13.10
"...
Important: If you are having issue with uBO being irremediably broken with the 1.13.10 update, try to un-install the re-install uBO -- possibly quitting Firefox before re-installing.
If this still does not work, you will have to fall back to re-installing 1.13.8 until I don't know when. See issue #2909.
Direct link to 1.13.8: https://addons.mozilla.org/firefox/downlo…an+fx+sm+tb.xpi.
If you are forced to downgrade, you should probably disable the auto-update for uBO:..."
Lange Rede, kurzer Sinn: Dieser WebExt-Legacy-Hybrid, Hermaphrodite-Trans... :wink: -Version war eben dafür gedacht, eben nicht die eigenen Filter,Regeln... etc etc etc manuell sichern zu müssen, bevor man auf die Webext-Only-Verion von Ublock-Origin wechselt.
Ich persönlich stelle keine Verlangsamung, Trägheit fest: Liegt wohl daran, daß ich den Browser zurück gesetzt habe.