Now, for the first time in history, I can run Firefox and some other memory-hog programs together. This screen shot shows Firefox and Android Studio, no more crash due to memory leak from Firefox.
If you are not so convinced, you may try the portable version first. It won't overwrite your current Firefox. What I've been doing, though I have to close one to use the other. To tell you the truth, I have not touched the old version for at least 2 months.
A must tweak is to block annoying ads that also consume lots of
resources. After trying many of them, the uBlock is the one that does
not use lots of CPU and memory like Adblock and AdGuard etc. And it is
very fast loading pages, so fast that I cannot see any sign of
ad-blocking process which I can with other such add-ons.
I also add this great add-on to Yandex on my phone and tablet. Not only clean and quiet, Yandex now is also extremely smooth and fast. Yandex is the only browser I found acceptable for phones and tablets, and I can really use it to do what I do with Firefox on my computer.
You can copy and paste the following list into your uBlock filter, to block those annoying content found on some Chinese sites (6park etc.). In addition, check "CHN: EasyList China (中文)".
www.bassresource.com##DIV[id="om-c6ckhspxn06fcreu"][class="baltimore-background baltimore-c6ckhspxn06fcreu baltimore-optin-visible baltimore-has-image baltimore-lightbox baltimore-transparent"]