**[Affected versions]:** - Firefox Nightly 87.0a1 - Build ID: 20210203093146 **[Affected Platforms]:** - Windows 10 x64 - Mac 10.15 - Linux Mint 20 **[Prerequisites]:** - The browser is not set as default. - Have this [user.js]() saved to your PC. **[Steps to reproduce]:** 1. Create a new profile but do not open the browser. 2. Go to the profile folder and paste the "user.js" from prerequisites. 3. Navigate to the "about:preferences" page. 4. Uncheck the "Always check if Nightly is your default browser" option from the "General" section. 5. Open a "New Tab" and observe the behavior. **[Expected result]:** - The "Set as Default" notification is not displayed. **[Actual result]:** - The "Set as Default" notification is displayed in the top part of the page. **[Additional Notes]:** - After following the steps from above, the "Set to Default" experiment notification will be redisplayed after each 24h. - This issue is not reproducible with the existing "Set as Default" feature notification. - Attached a screen recording of the issue.
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**[Affected versions]:** - Firefox Nightly 87.0a1 - Build ID: 20210203093146 **[Affected Platforms]:** - Windows 10 x64 - Mac 10.15 - Linux Mint 20 **[Prerequisites]:** - The browser is not set as default. - Have this [user.js](https://drive.google.com/file/d/1sb_cH0N0LQD8Xmolsl0KTkAV5GaN3-Ao/view?usp=sharing) saved to your PC. **[Steps to reproduce]:** 1. Create a new profile but do not open the browser. 2. Go to the profile folder and paste the "user.js" from prerequisites. 3. Navigate to the "about:preferences" page. 4. Uncheck the "Always check if Nightly is your default browser" option from the "General" section. 5. Open a "New Tab" and observe the behavior. **[Expected result]:** - The "Set as Default" notification is not displayed. **[Actual result]:** - The "Set as Default" notification is displayed in the top part of the page. **[Additional Notes]:** - After following the steps from above, the "Set to Default" experiment notification will be redisplayed after each 24h. - This issue is not reproducible with the existing "Set as Default" feature notification. - Attached a screen recording of the issue.