...and how about some tips.
I'm somewhat familiar with FF. Please be more specific about what you want to know/do?
As for AdBlock, simply go here:
https://addons.mozilla.org/en-US/firefox/addon/adblock-plus/?src=hp-dl-mostpopular Then click "add to firefox." Then follow the prompts from there. The default settings work fine.
I attached a screenshot of the add-ons that I currently use, some of them may interest you. Most of them replace features that used to be standard on FF and/or YT... but they've f'ed up over the years. Just type the add-on name(s) in the search box at the site I linked above.
To see a list of, and control your add-ons (disable, preferences, remove)....look at the very top of your screen (when in FF): Click Tools > Add-Ons > Extensions
ANOTHER THING...FF's default navigation bar's layout sucks. Look to the far right of the navigation bar for the small box with 3 horizontal lines (says "open menu" when you put the cursor on it.) Click it, then click "+Customize" at the bottom of the pop-up menu. A tab will open up in which you can rearrange, add, remove items to and from the navigation bar by simply dragging the items to where ever you like. Certain add-ons will provide their own item/icon/interface which can be found in this tab...for you to place where ever you like. Remember to click "exit customize" (bottom right/green) when you're finished.