Have been running Firefox for a few hours and I am very satisfied. I did get the adblocker installed as you suggested.
The first thing I noticed was the first page loaded faster that it has been doing. Video is smoother.
The adblocker is okay, but there are still a lot of ads coming thru.
So, all in all, I like it.
Which adblocker are you using?
If adblock plus:
- go in the filter preference of adblock plus
- uncheck: Allow non-intrusive advertising
I haven't see any ads when my adblocker is enabled. You also can install adblock plus helper which allows you to block parts of a website with right mouse button menu.