JavaScript Whitelist Configuration

Dear Community,

I've been using Debian Stretch + LXDE for a while. At some point I realised I needed to find a better
Web browser application. Gnome Web seems to be a great browser, and I do understand its emphasis on minimalism and simplicity.

That said, I miss the opportunity to customise JavaScript behaviour. Namely, I would
like to turn off JavaScript completely and use some sort of exception list to provide
wildcarded URI entries (eg. *.gov or *.stackoverflow.com) which grant permission to
run JavaScript code for the minority of trusted websites.

I tried looking for possible solutions myself but to no avail.
Is there any reliable way to customise JavaScript behaviour with Gnome Web browser?
I would strongly appreciate any hints or configuration examples.

-- 
Best regards,
Hubert Wiedeke