OS: Windows 10
Opera gx: dont know ( downloaded it like a week ago)

Steps:

in above bar type something to search when page loads edit url and replace ?client=opera-gx with something other then opera or opera-gx hit enter

it enters loop replacing ?client field with opera it fails to do something and does it again thus sending more requests to google and i get "ERR_TOO_MANY_REDIRECTS"

note it dosnt work if u click on link, you have to press enter in url bar. i posted on it on reddit and someone said it does that in regular opera too