fdroid build
Bromite tried before, this is a completely new approach.
I've managed to remove the GMS libs and VR SDK(that one is easy, build flag), the two evident blobs in every Chromium or WebView apk out there. Decompile your WebView and see for yourself, no matter if "LineageOS for microG", "CopperheadOS" or some privacy-focused fork.
More than that, as it's fdroid policy I'm used to, I've removed bundled Android SDK and NDK(symlink to system SDK/NDK during build, works best), removed bundled binutils(flag permits to use system ones), removed Google's prebuilts of NodeJS(to be downloaded from upstream NodeJS instead), removed prebuilt of GN(will be compiled before the browser), removed bundled Clang and LLVM, and much more. More or less, everything evident is out.
Unfortunately, there are a lot of exceptions still to be made here.
Other problems:
So, I pushed for Archive and only one Arch-Target pair for now, considering the exceptions and all. At least it will be a huge improvement over status quo in the Android world in general. Maybe Replicant team will get interested too, they are definitely not that secure using a 3-year-old WebView