I want to develop a custom, local Firefox extension and investigate, if its installation has any impact on the browser fingerprint.
Some time (years?) ago, there were articles advising against installing too many browser extensions, as they would make the browser client more identifiable and trackable by leveraging more unique fingerprints (if I remember correctly).
I guess, Mozilla in the meanwhile also had hardened its extensions API (was it v60?), which might make statements not comparable to status quo.
Does using a custom, locally developed (or more in general any) extension have an impact on the browser fingerprint?
Have browser APIs been more "generous" in terms of querying installed extensions, so that this advice has made sense in the past?