https://i.imgur.com/TQGrQhl.pngThe binary is 45.5KB, or in other words the very crude renderer is only 1.5KB. It just needs a CSS subsystem and implementations of "irregular" elements (e.g. interactive stuff) and Acid2 pass will not be far off. It's been almost 10 years since I started... and the Web and mainstream browsers have only gotten (much) worse.
Keep in mind that in those 10 years, Dillo and NetSurf, which I am competing against, have not managed to pass Acid2 either, and their binaries are 1-2 orders of magnitude bigger.