Dither/noads-advanced — comment on commit 1b5aaa434af2680d83f95a8e33cf71768f4e8e62
File: scripts/noads-importer.js line 230
By Dither:

Probably should replace to 4 /*XMLHttpRequest.DONE*/ for the time being, Opera constants are a strange thing. In 12 it's properly defined as it should in a previous versions but who can say.