Website crawling and playback of web archives use URLs as unique references—this includes the query parameters (after the “?” and, for some tools, after the “#”). Adding parameters to the URL that do not affect what data is loaded from the server, or simply reflect a default where the page is the same with or without the property, complicates the capture and playback of the web archive and bloats the size of the crawl since every URL is captured as if it is a new page even if the content is identical.
This guideline is also useful for creating web archive friendly URLs:
46. Assign each unique page state one, and only one, URL