Do you use Opera Sync? If so, are you encrypting your data with a custom passphrase?
Do you user Opera's VPN?
Are you blocking 3rd party cookies?
Have you cleared all cookies for google.com?
Have you tried disabling all your extensions?
Are you using Opera's adblocker?
If you download the Opera installer, launch it, click "options", set "install path" to a folder on your desktop, set "install for" to "standalone installation", uncheck any checkboxes, you want and install (do not enable sync or anything in it), how does that Opera behave (right now at least)?
For this to happen, both Opera and Ecosia need to want it, and it has to be profitable for both.
So did you already contacted Ecosia? What they say about it? Di dthey already try an agreement with Opera?
@bamh1d Well, I can now report that the problem somehow seems to be resolved. That is to say, I can once again open links in Opera without having to close/re-open it. I don't understand any of this - how having an active Google tab seemingly blocked opening of other links, and how the problem apparently was fixed without any intervention from me. Anyone care to comment?
Opera supports search shortcuts, and unfortunately Z is the shortcut for Amazon. you either need to type a G before the whole thing (to force Google) or put it in quotes to force it to be considered a single search term.