There has only been two choices. Internet Explorer and browsers that use the Trident engine or Netscape and browsers that use the Gecko engine. In the good old days IE would load the source code into Notepad. Netscape would load the source code into a non editable window. To edit the code you would have to copy and paste it into Notepad before editing it and then remember where to save it and what file name to give it. So back then IE or an IE clone was my main browser. (NeoPlanet, AOL, etc) I would write the page using IE and when finished test and edit it to also work with Netscape. (Back then Netscape didn't support DIVs so had to also use LAYERs) The worst thing IE did, was to drop Notepad for its source code display window. (Like Netscape and clones) To restore this feature load IE and click on Tools, F12 developer tools. In the developer tools window click File, Customise IE view source, Notepad Then source code will always load into Notepad. Also IE and clones support VBScript, CSS rounded corners around a video (HTML5 code), etc, etc.