Cards
My personal card farming setup.
Browser
I daily drive Firefox already, and I have a separate profile for running cards. I use Firefox with an a la carte Arkenfox and Betterfox configuration, with some tweaks for less breakage.
Other extensions I run are a heavily redundant UBlock (my network runs a very strict DNS already).
Userscript Manager
I use ViolentMonkey as my userscript manager, mainly because it is open-source and has a sizeable community. The user experience is slightly worse than TamperMonkey, but I am willing to accept that tradeoff.