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Install the Live Server extension in VS Code.
Install Firefox Developer edition on your Linux machine.
Open VS Code and open the project folder you want to work on.
Click on the "Go Live" button in the bottom bar to start the Live Server.
After the server starts, a browser window will automatically open in VS Code with the Live Server homepage.
Click on the "Open With Live Server" button in the top right corner of the window.
Click on "Choose Default Browser" in the dialog box that appears.
In the "Choose a Default Browser" dialog box, select "Custom" from the drop-down menu.
In the "Command" field, enter the path to the Firefox Developer edition executable file. For example: /opt/firefox_dev/firefox-bin
In the "Arguments" field, enter the following: -new-window %uri%
Click "Save" to save the configuration.
Now, when you click on the "Open With Live Server" button, your project will be opened in Firefox Developer edition.