I read in Apple OSX PPC camp they (the only guy who still developes a PPC compatible browser version for PPC Macs) solved situation using javascript engine of webkit of 2 or 3 releases ago.

In the long time this solution will end in increasing incompatibility with sites supporting newer versions of javascript.

[EDIT]

Maybe we could contact this lone Mac PPC hero and exchange infos, sources and maybe co-opt him in the bug hunting quest.

[ Edited by Raf_MegaByte 17.01.2016 - 13:48 ]