In addition to ublock,
I would also suggest

• decentraleyes
  Stores commonly used librarys localy,
  instead of downloading them from a third party.

• clearURLs
  Removes tracking parameters from links.

• google search fixer
  Shows the more advanced search features,
  That firefox for Android currently doesn't get

• video Background Play Fix
  What the name says,
  Good when you use youtube in the browser.