This method is 99% effective for the base game and the Blood Dragon standalone expansion. It removes all login prompts.
If you are looking for a "bypass" because the launcher is preventing the game from starting, try these fixes from the Far Cry 3 Ultimate Setup Guide : far cry 3 bypass uplay link
If you find the launcher particularly intrusive, consider these alternatives: GOG.com version: Older Ubisoft titles on This method is 99% effective for the base
If you want to optimize your Far Cry 3 setup further, let me know: Are you running the or Ubisoft Connect version? What operating system are you using? Are you experiencing crashes or infinite loading screens ? far cry 3 bypass uplay link