Does not having BS Professional license impact Burp Extender?
Question is quite specific enough, but to elaborate, I basically plan on writing something to visualize the sitemap better, and in a aesthetically-pleasing fashion. So obviously the only information I need access to would be the sitemap, *unimportant: eventually converted to JS object format with a style I've already created*. Anyways, back on topic... any limitations I need to watch out for?
There are no limitations to developing an extension without a Burp Professional license.
Extension’s that make use of tools exclusive to Burp Pro will require the user has the relevant access to Burp Suite Professional. These extensions are tagged as a “Pro extension” in the BApp store.