In recent weeks FF will often slow to a crawl (or slower). Opening sites like WSJ.com or NFL.com can take >4 minutes (yes, I've timed it). The progress bar advances to ~75% loaded, but then appears to stall. At limes, touching a link results in . . . nothing, for over 7 minutes (yup, timed again). I've tried rebooting which seems to work for 10-20 minutes. I've tried closing and opening FF. I've found, sometimes, I can go to google.com, back to the previous page, and it loads. Other wifi apps (e.g, News Republic) don't seem slow.
How do I speed up FF?
FF 50.0.1 Android OS 5.0.2