I'm sorry you're miffed at your deficit of fake internet points, but your question really isn't very good.

• There's nothing specifically about Perl in it to start with.
• There's vague mention of "Chrome is now blocking external files" from a "local server", but I'm not sure what that means. Are you trying to do something that's partially reading from local disk files on the browser machine? If everything's coming from the same origin, what / why is blocked? But if this is coming from local disk files then how would a CGI invocation get into the mix?
• Additionally there's no actual code to gnaw on or have an idea
• There's not really a sample of what the frak you're actually trying to do. Not even an abstract "On page A I have a form with field 'FOO'. I need to take the value from 'FOO' and do X to it then post it to page B".

This is a jumble about forms and data and posts and CGIs and . . . I just don't understand any of what you're actually trying to accomplish. Why are you trying to post something to an intermediary destination only to re-post it somewhere else? Why can you not just post to the final destination directly? If there's something about the data that needs to be massaged, you seem to have access to the form with jQuery/JS so . . . massage it before it's posted.

Edit: In comparison to another of your recent questions, Regex to Array lookup question, can you see the deficit deficiency this against that? There while you were a bit vague and still didn't provide any, you know, code you did at least provide concrete sample data (your URLs, a handwavy list hinting at what you were wanting to pull out from the URLs, an example what you wanted to use that data for) and people were able to have a bit to work with. This . . . /shrug

Edit2: A phrase.