Assign Chrome Portable as default browser

I was using Chrome Portable for a month almost. Its great, i have no problem with it. But i cant assign it as default browser. It doesnt use the portable executable, it always uses the chrome.exe in bin folder. For example when im using telegram, i cant open links. I tried to change from windows' settings but theres no chrome portable. I tried my luck with regedit, it didnt work either. Is there a fix for this?