Right now, the fix Firefox released should be working for most users - just keep your Firefox running for few minutes and it should get automatically fixed (you should see new addon called "hotfix-update-xpi-intermediate" in the aboud:addons page). After that, restart Firefox and then wait again few minutes and your add-ons will get auto enabled again.
Another option is temporary load your addons, see this short video I've made: https://www.youtube.com/watch?v=jK-FC8icxnc
