http://www.puffinbrowser.com/, IOS and Android versions available. If Kindle Fire doesn't support Android Apps, then something is horribly wrong, because it's an Android OS. I don't know anything about Kindle Fires, but researching the browser and app base should have been part of your purchase decision. Amazon has Puffin on their app store (
http://www.amazon.com/CloudMosa-Puffin- ... 007VE5MBA/), so..... I would double-check that it doesn't actually work (?)
For the double-tap problem, Puffin (and probably other mobile browsers) have an on-screen simulated touchpad. You can also get a blue-tooth or USB mouse.
But, for the record, I'm not against a Galaxy Legion App. I would almost certainly download it if it were available. I just think it can be done on mobile devices already. Why doesn't someone make us one? There seems to be plenty of self-professed experts here.