I would like to point out that I was running an image, did the appropriate updates etc...for a few months... then probably something I did broke the iptables...
...so I can start over (the equivalent of reinstalling windows) but chances are good I will successfully break iptables again.
I am not saying it is your fault...Chromium is the issue...but iptables is the weakness that Chromium is exploiting.
I will work on what you wrote, and see if I can work around this...