It's probably just me, but I always struggle with the "latter" and "former" construction, especially when they are reversed like that. I had to read it several times before I understood. In case it helps someone else, it translates as:

  To counter your anecdote with some more anecdote, I 
  switched from Chrome to Firefox, and have felt that that 
  Firefox has some serious performance advantages over Chrome.  

I wonder sometimes if my inability to parse sentences like this relates to my preference for C over C++. The "former" and "latter" abstraction reminds me of Eli's examples here http://eli.thegreenplace.net/2016/returning-multiple-values-... of first->first and first->second.