To summarize, I have tried all of the other versions of Opera 64 related to this technical problem one by one and there is no problem.

Why didn't you try it on other old opera versions?

At the bottom of this comment I mentioned that I tried things in 58, 63 and 66. I also mentioned (higher up in that post) there that I allowed the extension access to search page results.

1. Install Chrome Extensions manual for Opera
   https://addons.opera.com/en/extensions/details/install-chrome-extensions/

2. Install Browsing Protection by F-Secure
   in https://chrome.google.com/webstore/detail/browsing-protection-by-f/jmjjnhpacphpjmnnlnccpfmhkcloaa

3. F-Secure safe trial install

Notice Here!

4. Opera: // Open extensions.
   Browsing Protection by F-Secure
   plugins-Details

Click '' Allow access to search page results ''.

google.com search page Opera 63 and older versions you'll see that works smoothly! As I mentioned, opera 64 also only works when you first google search, which is strange when a new tab opens google search does not work!?!

Any difference?

PS: I wrote this text in german using the google translate.

Now, for Opera, F-Secure Safe doesn't automatically install the extension. I had to go to the link and install it myself. I do so and allowed the extension to access search page results. However, no matter what I try, I don't get any green checks on Google and Yahoo search page results. It's as if the extension isn't really working in Opera.

Just for kicks, I uninstalled the extension in Opera and switched to developer mode in opera://extensions and chose to load the unpacked version of the extension from Chrome's profile folder (that F-Secure placed there). Onload of the extension that way, there's an error:

Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.
Context
_generated_background_page.html
Stack Trace
background.js:142 (sendHttpsscanQuery)

The function in question is:

function sendHttpsscanQuery(scanQuery, async, asyncFunc) {
    asyncFunc = asyncFunc || null;

    if (cooldown) {
        return null;
    }

    try {
        var srvurl = FS_SERVICE_URL + "/httpsscan";
        var xhr = new XMLHttpRequest();

        xhr.open("POST", srvurl, async);
        xhr.setRequestHeader("Content-Type", "text/plain");

        var content = JSON.stringify(scanQuery);

        log.debug("Sending " + content + " to: " + srvurl);

        if (async === true && asyncFunc !== null) {
            xhr.onreadystatechange = function() {
                asyncFunc(xhr);
            }
        }

        xhr.send(content);

        return xhr;
    } catch (e) {
        log.exception(e);

        log.debug("Cooldown for " + cooldownInterval + "ms");

        cooldown = true;

        setTimeout(function () {
            cooldown = false;
            log.debug("Cooldown over");
        }, cooldownInterval);

        if (cooldownInterval < FS_COOLDOWN_MAX) {
            cooldownInterval *= 2;
        }
    }

    return null;
}

and line 142 in the error is the xhr.open() line.

That was all in Opera 64. I tried Opera 63 and Opera 58 and Opera 66. All had the same results. The extension doesn't work.

I give a search term on google.com then it starts this o.g. extension does its job. As I said on the homepage of bowser is the address google.com was specified. Funny way it works without problems! however, if I open a new google.com search eg through speed-dial then this will not work anymore! If I'm doing everything wrong why all first open google.com search but not working on a new tabs anymore! problematic began with the latest version of the Opera. I have a vorversion specifically said opera 63 installed everything works fine.

Also, how exactly are you searching Google? Are you typing a search term in the address field or are you going to google.com and searching via the web page or are you using the Google search field on the Speed Dial page?

At the URL opera://extensions/?id=jmjjnhpacphpjmnnlnccpfmhkcloaade, do you have "Allow access to search page results" enabled for the extension?

Does the extension require that the F-secure program from https://f-secure.com/us-en/home? is installed for it to work?