@blackbird71
Thank you and good evening . . .
All clear and unexceptionable.

However the user may wish to change - among the proposed search engines (ahem... imposed) - only the domain from google.com to google.es or .fr, or .it only to have a better territorial response in the query results.

Always using google, the risks to the user of incurring malware/adware hijacking, would remain the same, indeed, it would certainly be minor to that in which the user could incur, installing for eg. an extension not previously checked by google. As sometimes happens. . .

The gain of Opera for the use of the search engine would remain unchanged, I think, because the user will always use google, but the user would have a service more targeted to his needs.

I hope I was clear.

Greetings . . .

@stratoblu: offering as a result
a search page without the blocked site (s), but with a notice informing the n. of sites blocked for that search

this plugin would be better if, as in a similar plugin on Chrome, were able to block the site
already from the search results, without being forced to open the page obligatorily.

@leocg good evening and thanks for the reply.

So, what is the purpose of the "Other search engines" feature if these cannot be used?

Hello

Set personal search engine as default

Opera v65.0.3467.48, offers 6 preset search engines, of which https://www.google.co.uk/search is the default engine

Opera v65.0.3467.48, seems to allow the use of other search engines, in fact there is a specific item: "Other search engines" and - to that item - it is possible to set other search engines.

However, the search engine I selected - which is always google, but with a domain other than ".co.uk" because I chose to locate google in my country is not available.
I mean, I can't make default - eg. http://google.es -
Even after restart.

Is it a bug, an oversight, or a precise choice of Opera?

Cheers...