Sounds like you're volunteering to maintain the XSLT support in Firefox. That's great! That means when Chrome tries to decommission it, users who rely upon it will flock to Firefox instead because it's the only browser that works right with the websites they use.
It's a question about whether you still beat your wife. If the answer is yes, then your answer is yes, and if the answer is no, then your answer is no.
It sounds like you're looking for a jurisdiction where you can beat your wife.
At the very least it's (probably*) illegal whether you agree with it or not. Even where it's not illegal, physical violence against your partner isn't okay, even if they've angered you.
This is all entirely off-topic from using XSLT in a website. As opposed to rendering XSLT client-side or server side, or rendering it using an in-engine native-implementation API or a JavaScript engine.
Happy to talk about those if you want; not interested at all in this violence digression you've decided to go on.
Firefox ascendancy is overdue. Best of luck!