The big upgrade is a substantial overhaul of Reader Mode to pick up interval improvements in Readability. I remind folks that I went all-in on Reader Mode for a reason: it's lightweight, it makes little demands of our now antiquated machines (and TenFourFox's antiquated JavaScript runtime), and it renders very, very fast. That's why, for example, you can open a link directly in Reader Mode (right-click, it's there in the menu), the browser defaults to "sticky" Reader Mode where links you click in an article in Reader Mode stay in Reader Mode (like Las Vegas) until you turn it off from the book icon in the address bar, and you can designate certain sites to always open in Reader Mode, either every page or just subpages in case the front page doesn't render well — though that's improved too. (You can configure that from the TenFourFox preference pane. All of these features are unique to TenFourFox.) I also made some subtle changes to the CSS so that it lays out wider, which was really my only personal complaint; otherwise I'm an avid user. The improvements largely relate to better byline and "fluff" text detection as well as improved selection of article inline images. Try it. You'll like it.
I should note that Readability as written no longer works directly on TenFourFox due to syntactic changes and I had to do some backporting. If a page suddenly snaps to the non-Reader view, there was an error. Look in the Browser console for the message and report it; it's possible there is some corner I didn't hit with my own testing.
In addition, there are updates to the ATSUI font blacklist (and a tweak to CFF font table support) and a few low-risk security patches that likely apply to us, as well as refreshed HSTS pins, TLS root certificates, EV roots, timezone data and TLDs. I have also started adding certain AI-related code to the nuisance JavaScript block list as well as some new adbot host aliases I found. Those probably can't run on TenFourFox anyway (properly if at all), but now they won't even be loaded or parsed.
The source code can be downloaded from Github (at the command line you can also just do git clone https://github.com/classilla/tenfourfox.git) and built in the usual way. Remember that these platform updates require a clobber, so you must build from scratch. I was asked about making TenFourFox a bit friendlier with Github; that's a tall order and I'm still thinking about how, but at least the wiki is readable currently even if it isn't very pretty.
