Ehh, not too much. I sometimes add some when I need them.
I always have forecast fox, gmail manager and adblock plus installed.
At PC's where I have an old fashioned mouse (I use a trackball with back/forward buttons on my office PC and mouses with back/forward buttons on most of my other PC"s) I also install Firegestures. And then I sometimes use reloadany whenever I need it but I don't install that by default.
Apart from that my firefox looks rather firefoxy.
See attachment below
I should admit that I'm not that much looking forward to spring.
I am really a winter person. I have a summer dip and I really feel good in the winter.
You'll see. So far so good, but I feel I'm going down already.