“Singular they” has been common in english since somewhere in the 1300s. Idk how it is confusing, and even if it is, do those individual’s opinion outweigh like grammar? If people are confused they can learn, lest they be confused forever. “They” in this instance would be replacing “he”, so I think the benefit is clear. Or avoid ambiguity by just saying “the developer” (cus I think it was Dev documentation iirc).

Edit:
Maybe it was referring to the browser itself? Therefore “it” would make things much less confusing.