How to Uninstall XXXXX

Windows10 Firefox

So to uninstall XXXXX from Windows 10, make sure that you are using the old add/remove UI.
To ensure that you are, follow these steps:

    

  1. Use WinKey+R to open the “Run dialog”
    2. 

  2. Type: control appwiz.cpl
    3. 

  3. Press “OK”
    4. 

  4. Scroll down to the “XXXXX” entry and double click it
    5.

参考
・How to Uninstall Vivaldi (Windows 10) | Vivaldi Browser Help