I enjoy the Pocket integration in Firefox, as well as reader mode (which I think is powered by Pocket?).<p>I also have an extension that allows me to mimic other user agents (useful for some sites to immitate an iPhone on Android). Since Firefox comes with &quot;Request desktop site&quot; by default though, this one is less important.<p>Other than that: Greasemonkey is very useful to me, as I have a bunch of scripts that minimize page layouts of sites I frequent.