Bugzilla

**Notes**
* This issue happens in most of the cases only when opening a PBM window with the keyboard shortcut(CTRL+SHIFT+P), but it can also happen intermittently when opening PBM windows from the context menu. 

**Found in**
* Beta 114.0b5;

**Affected versions**
* Beta 114.0b5;
* Nightly 115.0a1;

**Tested platforms**
* Windows 11;
* Windows 10;
* Ubuntu 22; 

**Affected platforms**
* Windows 11;
* Windows 10;

**Unaffected platforms**
* macOS;
* Ubuntu;

**Preconditions**
* Have a Firefox .exe build installed on your machine.

**Steps to reproduce**
1. Launch Firefox.
2. Open a few Private Windows using either the keyboard shortcut or the context menu from the taskbar icon. 
3. Right click on the icon on the taskbar and select ‘Close all Windows’. 

**Expected result**
* All windows close.

**Actual result**
* Not all windows close. 

**Regression range**
* Will look for one ASAP.

**Notes**
* This issue happens in most of the cases only when opening a PBM window with the keyboard shortcut(CTRL+SHIFT+P), but it can also happen intermittently when opening PBM windows from the context menu. 
* This issue happens whilst closing normal browsing mode windows as well. 

**Found in**
* Beta 114.0b5;

**Affected versions**
* Beta 114.0b5;
* Nightly 115.0a1;

**Tested platforms**
* Windows 11;
* Windows 10;
* Ubuntu 22; 
* macOS12;

**Affected platforms**
* Windows 11;
* Windows 10;

**Unaffected platforms**
* macOS;
* Ubuntu;

**Preconditions**
* Have a Firefox .exe build installed on your machine.

**Steps to reproduce**
1. Launch Firefox.
2. Open a few Private Windows using either the keyboard shortcut or the context menu from the taskbar icon. 
3. Right click on the icon on the taskbar and select ‘Close all Windows’. 

**Expected result**
* All windows close.

**Actual result**
* Not all windows close. 

**Regression range**
* Will look for one ASAP.