I use Vivaldi browser. I use multiple websites using my keyboard and wireless mouse so I use the mouse to activate/use keyboard shortcuts. As of now all my websites that I use are using the same keyboard shortcuts except for BazQux. The main issue is using the keyboard right/left buttons to file through all my RSS articles BUT BazQux does not allow this instead uses the J/K buttons.
QUESTION: Has anyone able to change the keyboard shortcut keys? Any apps that can do this? I have tried a browser extension called “Keyboard Shortcuts for Websites” but it doesn’t work on Bazqux site 
Any ideas and/or suggestions are appreciated 