https://paradigmzero.github.io/firefoxbookmarktransform/index.html
Firefox Bookmark transform but as a webpage (HTML, JavaScript)
Based on the functionality of the following npm package, it is designed to do the same, just with a web interface: https://github.com/ParadigmZero/FirefoxBookmarkTagTransform
A series of dummy pages used for a word counting app: https://github.com/ParadigmZero/WebpageWordCounter