Affected versions

• NB 100.0a1 (64-bit)

Affected platforms

• Win 10 x64
• Win 7 x86
• Win 11 x64

Steps to reproduce

1. Install Firefox.
2. Set the pref for private browsing “browser.privacySegmentation.enabled” to true in about:config.
3. Enable “devtools.chrome.enabled” to true in about:config.
4. Do a Firefox restart.
5. In Browser Console enter “ShellService.pinToTaskbar(true);” for PBM feature.
6. Open a new Private window.
7. Go to about:telemetry page and in Scalars look for “os.environment.launch_method”.

Actual results:
In about:telemetry we get the following: “os.environment.launch_method = Taskbar”.

Expected results:
In about:telemetry we should see “os.environment.launch_method = TaskbarPrivate”.

Suggested Severity

• S4, since it is only a label change for the PBM feature.

Did you completely close Firefox and then re-open it through the pinned Private Browsing pin? Or open a new window from the existing instance. If you did the latter, this is expected. If it was a fresh launch from the new Private Browsing pin it should be TaskbarPrivate.

(In reply to bhearsum@mozilla.com (:bhearsum) from comment #1)

Did you completely close Firefox and then re-open it through the pinned Private Browsing pin? Or open a new window from the existing instance. If you did the latter, this is expected. If it was a fresh launch from the new Private Browsing pin it should be TaskbarPrivate.

If I follow the exact steps from description I get "os.environment.launch_method = Other", but if I do a Firefox restart and open the Private window from taskbar I get the correct "os.environment.launch_method = TaskbarPrivate ". I think we can close this issue, right?

(In reply to Monica Chiorean from comment #2)

(In reply to bhearsum@mozilla.com (:bhearsum) from comment #1)

Did you completely close Firefox and then re-open it through the pinned Private Browsing pin? Or open a new window from the existing instance. If you did the latter, this is expected. If it was a fresh launch from the new Private Browsing pin it should be TaskbarPrivate.

If I follow the exact steps from description I get "os.environment.launch_method = Other", but if I do a Firefox restart and open the Private window from taskbar I get the correct "os.environment.launch_method = TaskbarPrivate ". I think we can close this issue, right?

I think so -- the launch method through the private icon certainly sounds right.

For the first launch, did you let the installer launch Firefox for you after installation was completed? If so, "Other" sounds like the expected value. (If you launched it by hand through a Desktop or Start Menu icon that is probably a separate bug.)

(In reply to bhearsum@mozilla.com (:bhearsum) from comment #3)

(In reply to Monica Chiorean from comment #2)

(In reply to bhearsum@mozilla.com (:bhearsum) from comment #1)

Did you completely close Firefox and then re-open it through the pinned Private Browsing pin? Or open a new window from the existing instance. If you did the latter, this is expected. If it was a fresh launch from the new Private Browsing pin it should be TaskbarPrivate.

If I follow the exact steps from description I get "os.environment.launch_method = Other", but if I do a Firefox restart and open the Private window from taskbar I get the correct "os.environment.launch_method = TaskbarPrivate ". I think we can close this issue, right?

I think so -- the launch method through the private icon certainly sounds right.

For the first launch, did you let the installer launch Firefox for you after installation was completed? If so, "Other" sounds like the expected value. (If you launched it by hand through a Desktop or Start Menu icon that is probably a separate bug.)

First time I launched Firefox was through the Profile Manger using cmd on install folder (step1) and after setting the preferences I used CTRL+R on Browser Console (step 4).

(In reply to Monica Chiorean from comment #4)

(In reply to bhearsum@mozilla.com (:bhearsum) from comment #3)

(In reply to Monica Chiorean from comment #2)

(In reply to bhearsum@mozilla.com (:bhearsum) from comment #1)

Did you completely close Firefox and then re-open it through the pinned Private Browsing pin? Or open a new window from the existing instance. If you did the latter, this is expected. If it was a fresh launch from the new Private Browsing pin it should be TaskbarPrivate.

If I follow the exact steps from description I get "os.environment.launch_method = Other", but if I do a Firefox restart and open the Private window from taskbar I get the correct "os.environment.launch_method = TaskbarPrivate ". I think we can close this issue, right?

I think so -- the launch method through the private icon certainly sounds right.

For the first launch, did you let the installer launch Firefox for you after installation was completed? If so, "Other" sounds like the expected value. (If you launched it by hand through a Desktop or Start Menu icon that is probably a separate bug.)

First time I launched Firefox was through the Profile Manger using cmd on install folder (step1) and after setting the preferences I used CTRL+R on Browser Console (step 4).

OK, let's close this then. "Other" is expected if you're launching Firefox through cmd.exe.