Bugzilla

**[Affected Versions]:**
- Firefox RC 82.0 (Build ID: 20201014125134)

**[Affected Platforms]:**
- Windows 10 x64
- Windows 7 x64

**[Prerequisites]:**
- Have a new Firefox profile created.
- Have the user.js saved in the profile folder before opening the profile. (There should only be 2 files in the folder, times.json and user.js)
- Have the Terminal opened.

**[Steps to reproduce]:**

1. Start the Firefox profile from prerequisites using the `first-startup` flag.
2. Navigate to the “about:preferences#privacy” page.
3. Uncheck the “Allow Firefox to install and run studies” option.
4. Navigate to the “about:studies” page and observe.

**[Expected results]:**
- The study can be observed in the “Completed studies” section.
    
**[Actual results]:**
- The study is still in the “Active studies”.

**[Notes]:**
- The unenroll telemetry ping is not displayed in the “about:telemetry#events-tab” page.
- The issue can be reproduced for the following studies: “Multi-Stage About:Welcome Zero Stage”, “Homepage Remediation: Search Value Props Experiment”, and “Wizardless Password Autocomplete”.
- The issue is not reproducible for Firefox Beta 83.0b1.
- Attached a screen recording of the issue.

**[Notes]:**
- I have managed to reproduce the issue for the following studies: “Multi-Stage About:Welcome Zero Stage”, “Homepage Remediation: Search Value Props Experiment”, and “Wizardless Password Autocomplete”. However, I think that this issue affects all the Firefox 82 experiments that are being delivered through Nimbus.

**[Affected Versions]:**
- Firefox RC 82.0 (Build ID: 20201014125134)

**[Affected Platforms]:**
- Windows 10 x64
- Windows 7 x64

**[Prerequisites]:**
- Have a new Firefox profile created.
- Have the user.js saved in the profile folder before opening the profile. (There should only be 2 files in the folder, times.json and user.js)
- Have the Terminal opened.

**[Steps to reproduce]:**

1. Start the Firefox profile from prerequisites using the `first-startup` flag.
2. Navigate to the “about:preferences#privacy” page.
3. Uncheck the “Allow Firefox to install and run studies” option.
4. Navigate to the “about:studies” page and observe.

**[Expected results]:**
- The study can be observed in the “Completed studies” section.
    
**[Actual results]:**
- The study is still in the “Active studies”.

**[Additional Notes]:**
- I've verified if other means of making the profile ineligible (from a targeting standpoint) will reproduce the issue and it does not. In order to do this, I've done the following:
     - I've enrolled a new profile in the experiment using a Firefox 82 Release.
     - I've opened the same profile with a Firefox 81 Beta by adding the `--allow-downgrade` argument in the Terminal.
- The issue is not reproducible for Firefox Beta 83.0b1.
- Attached a screen recording of the issue.