I was using Qutebrowser since some months because I had some problems with how Firefox causing data loss, but I had to go back to Firefox recently because Qutebrowser is too slow and memory-consuming w/ many tabs open, even if suspended (i.e. >= 10 or 15 tabs for me). Firefox 61 now consumes way less memory and no idle CPU at all thanks to a strict Ublock Origin policy (basically no JS or >=1Mb images if you're not a snowflake; I had similar blocking in Qutebrowser too). Is this something you experience too, or maybe caused by my setup?