Okay, I did a successful build of Basilisk using the "-march=i686 and -mno-sse2" flags. However, after doing a little research on compiler options, I learned that "i686" will do a generic build for compatibility with the Pentium Pro. Seeing as how (probably) nobody in their right mind is still using a Pentium Pro for modern web browsing, it seems that the "pentium3" flag would be better suited for us, as it leverages MMX, as well as plain old SSE, whereas the "i686" flag does not. I'm recompiling it now, and should have the better optimized build uploaded to my Google Drive account soon . I favor Basilisk over Pale Moon, as it more closesly resembles Firefox 52 (best Firefox release evar).