1795250 - Support running script in Chrome-in-content context (system principal)

Status: ASSIGNED

(Testing :: geckodriver, enhancement, P3)

Description

[James Graham [:jgraham]]

Pre-fission it was possible to run script in the chrome context using switch-to-context. Post fission that only allows running script in the parent process; we don't have an equivalent of "run script in the content process but with the system principal".

Implementation wise this is basically just passing in sandbox=system.

Comment 1

[James Graham [:jgraham]]

Attachment: Bug 1795250 - Allow executing script with system principal in content process

This adds endpoints:
/session/{sessionId}/moz/execute/sync/chrome
/session/{sessionId}/moz/execute/async/chrome

These allow running script in the content process with the system
principal (vs set context which switches to the parent process).