I recommend to at least enable uBlock Origin as it will save you a lot of resources whilst browsing the web. There's a whole bunch of other privacy and resource related addons I also like, but it goes a bit too far to mention those.
uBlock Origin, AdBlock Plus, and other random flavor-of-the-year ad blockers are IIRC the #1 contributor to Firefox slowness, resource usage, and crashes for some years now. They are key examples of “expert user footguns” and I shudder to think how many users are incapable of repairing their browser when damaged by one or more of these addons. Yes, they can reduce bytes over the wire, but they do often come at the cost of reliability and efficiency that disabling them is often sufficient to diagnose browser problems with no other steps taken. “This site doesn’t show any ads, how could it possibly be uBlock?” is the most depressing question an expert has ever asked me about Firefox.
I have only my memories, which is what IIRC means: “if I remember correctly”. A few seconds of searching offers no better answer, so you’ll simply have to downvote me and move on.
(For those who want to investigate further, I believe it was about a year ago and would have been on planet.mozilla.org at the time. No, I didn’t post it to HN because I don’t usually consider anti-adblock positions to be safe to discuss here.)
After I made my previous post you added a source about _ABP_ being a memory hog. Show me a source that uBlock Origin is a memory hog compared to vanilla and ABP.
This article [1] shows how ABP is, indeed, a resource hog, compared to uBlock Origin. It also shows that pages load quicker with uBlock Origin than vanilla. Its an article from 2 years ago though.
This article [2] talks about how in december 2018 uBlock Origin uses WASM for better performance. It includes a link to benchmark the software.
This article [3] from begin 2019 compares the performance of different adblockers (the article is by the authors of Ghostery though therefore I link to the Reddit discussion).
