2041464 - Expand ValidatePrincipal checks around document loading

Status: NEW

(Core :: IPC, enhancement)

Description

[Nika Layzell [:nika] (ni? for response)]

Now that we've turned on ValidatePrincipal checks everywhere in bug 2027207, we can start to tighten the checks further, adding more validation for additional properties beyond the document principal.

Comment 1

[Nika Layzell [:nika] (ni? for response)]

Attachment: Bug 2041464 - Expand ValidatePrincipal checks around document loading, r=smaug!

This patch expands the principal validation checks around document loading in
the following ways:

1. Check URLs which have a corresponding content principal in more cases.
2. Check precursor principals when loading a null principal.
3. Unified logic for deciding if system principal is allowed for a document load.