I’m still using Version 2 because some of my add-ons have not been updated. Now that it’s the end of the line, I’ll have to do some research this weekend to see whether its worth having them or if there are replacements. On the other hand, some on here have reported earlier that version 3.0 is buggier than ver. 2.0 and they have gone to another browser.
I have found that 3.0.5 does not consume as much system resources as 2.0 did.
Almost most of my add-ons have come up to speed. The ones that didn’t, and won’t, I can do without or I was able to replace with a similar type from a different creator.