Bugzilla

**Affected versions**
* 68.2.0esr, 70.0.1, 71.0b7, 2.0a1 (2019-11-06)

**Affected platforms**
* Windows 10, macOS 10.13, Ubuntu 18.04.

**Steps to reproduce**
1. Launch Firefox, enable DevTools - Netmonitor;
2. Access any page and block any request, add blocking patterns;
3. Access any of the pages listed in about:about;
4. Return to the previous page

**Expected result**
* requests are still blocked;

**Actual result**
* requests are not blocked, patterns are not kept anymore;

**Enhancement suggestion**
With the current Request blocking panel:
* request blocking can be disabled on the about: pages and get re-enabled when returning to the previous page; 
* a "hard disable" without the possibility for the user to toggle the Enable checkbox; 

**Regression range**
* will provide one asap;

**Additional notes**
* attached recording with the main issue.

**Affected versions**
* 68.2.0esr, 70.0.1, 71.0b7, 2.0a1 (2019-11-06)

**Affected platforms**
* Windows 10, macOS 10.13, Ubuntu 18.04.

**Steps to reproduce**
1. Launch Firefox, enable DevTools - Netmonitor;
2. Access any page and block any request, add blocking patterns;
3. Access any of the pages listed in about:about;
4. Return to the previous page

**Expected result**
* requests are still blocked;

**Actual result**
* requests are not blocked, patterns are not kept anymore;

**Enhancement suggestion**
With the current Request blocking panel:
* request blocking can be disabled on the about: pages and get re-enabled when returning to the previous page; 
* a "hard disable" without the possibility for the user to toggle the Enable checkbox; 

**Regression range**
* not a regression;
* appeared with implementation of feature - pushlog [URL](https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=30b70a449280e6df10496a51e89c01b8c98bb92e&tochange=72be82c6809e2cc187e5cffdff0c3e686c564a57);

**Additional notes**
* attached recording with the main issue.