I just decided to make the switch to Chrome. I've used FF exclusively for many years, but noted lately how much it lags when going from page to page on a site, especially in forums such as this.
I use LastPass extension to manage my passwords, and it has been lagging several seconds when I bring up the login page to a site. With Chrome and the LastPass extension, the username/password fields are populated instantly.
A couple of things I miss from FF, but still tweaking Chrome to get close. Backspace to go back a page, there's an extension for that. Still looking for a way to choose between download or open a file when I click on it. It's simpler to "open" a PDF/document/image than to download then open.