Firefox locks/crashes on page navigation.

I installed Firefox about weeks ago. Samsung Galaxy 3 running 4.1.1 OS (rooted). Especially after last two releases I have unresponsive links (touch and no response), non-responsive X to stop page loading, pages that take 2 minutes to load or time-out (not to not-found or similar) to the original page (no change or error message), slow and often hard to confirm selections, especially on drop-downs (re-sort on Cnet mobile page resonse to selecting drop-down took 30 second---tried it 4 times!). Firefox us degrading on the desktop because of too much release churn and producing new releases on unstable bases- I've been using it for at least 8 years. I moved to ff mobile because Dolphin started to make some stupid changes not wanted by users causing loss of features, slow response, and new bugs. Is that what's haopening to Firefox mobile?