URLSearchParams.keys() is broken when running in GM

[ppixiv]

Not sure if this project is active, but thought I'd at least mention this:

Iterating over URLSearchParams.keys() fails inside the GM environment with "TypeError: searchParams2.keys() is not iterable". It looks like the Symbol.iterator symbol is lost from the object returned from keys(). unsafeWindow.URLSearchParams works.

iterator.txt

[arantius]

Confirmed with example from documentation ( https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams/keys#examples ); i.e. https://gist.github.com/arantius/933b3921877c3ac4316f38dbc956784d .

This feels like a bug in Firefox, most likely.

[arantius]

This is http://bugzil.la/1023984 .