It also replaces the loadURIWithFlags function, the may cause problems and even tabs can not be loaded.
If you encounter this problem, close any Firefox instances, and hold down the Shift key to start Firefox to safe mode, then disable one of them in Add-ons Manger.
https://addons.mozilla.org/firefox/addon/load-tabs-progressively-fixed/
It also replaces the
loadURIWithFlags
function, the may cause problems and even tabs can not be loaded.If you encounter this problem, close any Firefox instances, and hold down the Shift key to start Firefox to safe mode, then disable one of them in Add-ons Manger.