In the past I could inlude a link to http://getfirebug.com to retrieve a compressed version of firebug light: <html> <head> <script src="http://getfirebug.com/releases/lite/1.2/firebug-lite-compressed.js#startOpened"></script> </head> <body> <span>Hello world</span> </body> </html> That does not work anymore. =>Please provide a compressed version in this github repo. Also see https://stackoverflow.com/questions/58521474/how-to-include-firebug-light-without-access-to-http-getfirebug-com