Add support for other browsers, such as Firefox, Opera and provide instructions

[halfpeeled]

• Feature description:
  Please add support for popular browsers such as Firefox and Opera, or if such support exists, please provide instructions for installation and use.

• Reason for the feature or improvement:
  As part of my own development process, I use various browsers for testing, and would like to be able to use browsers other than Chrome and Edge.

• How does your idea fit with the aim/scope of the project?
  This added support will allow a more browser agnostic approach to use.

• What are the merits of the feature?
  I believe this added support will further empower the tool's ability to analyze usability and inclusiveness by providing greater flexibility for the environments it can used in.

• Screenshots, if you can show something similar, or a sketch:
  I was not able to install for Firefox
  
  
  

• Any other information:
  Thank you for your consideration!