Ditto on the Firefox comment. Definite memory leaks, but still worth putting up with vs. the alternatives. Just shut down and re-open every couple-few days.
From my reads in Windows task manager Firefox hogs less memory than Chrome and Internet Explorer. So I mostly use Firefox and “refresh” it once per day via cold shutdown of the process in Windows task manager....
Then accurate restart of my tabs and windows via session manager extension
Use of flash block extenstion is a must to tamp down Firefox memory hogging a bit