Why do it yourself when there is automation?
Setting up locally running TOR in Firefox for Android with “about:config” access
Why Extensions can't modify Mozilla sites (like AMO)
Why extensions are not allowed to modify pages like AMO by default and how to override this behaviour if you must
Cookie Import/Export
Import and export your cookies and cookie permissions
Manage Search Engines
A simple button to “Manage Search Engines” of your browser.