Edge may have different requirements. A useful source of information is w3schools. I have local .html files displayed in Firefox and another browser using the format shown in the attached image. I couldn't post it directly.

Firefox can be a bit picky about closing tags. When you View Source -- and I suggest reloading the View Source page using Ctrl+R just to confirm it's the latest version -- does Firefox color any of the tags in red? (It's normal to see HTML entities such as & in red, but not tags.)

Edge may have different requirements. A useful source of information is w3schools. I have local .html files displayed in Firefox and another browser using the format shown in the attached image. I couldn't post it directly.

Tried this it did not work

Hello, I am learning web development and I was told to use Firefox as my IDE because of its developer options. But whenever I try to display a .html file all I get is a blank page although I can view the file in Microsoft Edge. Also when I check page source or inspect page, I can view my .html code in the background but on the frontend I get a blank page. Please could you guys help please? I don't know what to do Thank you

Thank you very much everyone for your help. Turns out that there was a bug in my styling( because it did not display in Edge also). When I erased all rules and started from scratch it began to display in Firefox and Edge.

Thank you