Bugzilla

We did some limited testing for this as well on Firefox Enterprise 149.0a1 (Build ID:20260221191449) in the Alpha test run, and noticed that while BlockAboutConfig value is updated in about:policies, when: 
- set to `True` it applies without browser restart after 1-2 minutes when accessing about:config
- Set to `False` it does not apply without browser restart

**Note: **
When the policy blocks access, what is seen is this ["page is not loading" message ](Restricted error text does not appear when accessing restricted pages (internal/non-internal)).

We did some limited testing for this as well on Firefox Enterprise 149.0a1 (Build ID:20260221191449) in the Alpha test run, and noticed that while BlockAboutConfig value is updated in about:policies, when: 
- set to `True` it applies without browser restart after 1-2 minutes when accessing about:config
- Set to `False` it does not apply without browser restart

**Note:**
When the policy blocks access, what is seen is this ["page is not loading" message](https://bugzilla.mozilla.org/show_bug.cgi?id=2018619) so maybe this is caching somehow when unblocking user access without restart.

We did some limited testing for this as well on Firefox Enterprise 149.0a1 (Build ID:20260221191449) in the Alpha test run, and noticed that while BlockAboutConfig value is updated in about:policies, when: 
- set to `True` it applies without browser restart after 1-2 minutes when accessing about:config
- Set to `False` it does not apply without browser restart

**Note:**
When the policy blocks access, what is seen is this ["page is not loading" message](https://bugzilla.mozilla.org/show_bug.cgi?id=2018619) so maybe this is caching somehow when unblocking user access without restart.

Please check the list of [Live policies](https://docs.google.com/document/d/1iaZdmszN8DK2gRzdz0c1HQHZm0SrfRstqy4C8KjClCs/edit?usp=sharing) we compiled and deny or confirm if they can be used as such.