launcher --show-component-extension-options to see the extension in opera://extensions. Then, click "details" on the extension and look in the address field or turn of developer mode before clicking "details" and look at the details, and you'll see the id, which is "ionkhgehfolinkdpgdbinmgbfaonpcnk".
You can look in Preferences, Local State and Secure Preferences to see what you can find after clicking "Not now" and closing Opera. While I did find mention of that ID, I didn't see a setting anywhere that looked like a "user said not now" setting or a "last timestamp user said not now" setting. But, maybe you can find it.
I did ctrl + shift + i for developer tools on "amazon.com", switched to the "Applications" tab and cleared different storages and cookies etc., but none of that cause the extension to pop up and ask to be installed when visiting amazon.com again. So, I'm doubting it's store there.
I looked at a few other files in the profile folder, but didn't see what I was looking for.
An alternative might be to install the extensions and then disable it in opera://extensions. Maybe it'll stop bugging then since it's already installed.
@jbrandon I am really glad that I made my point clear and I highly appreciate your understanding and the effort you take in answering. I feel heard and understood - thank you for that!
I also hope that more users will add to this thread or somehow contribute to the "opinion building" about monetarizing your business model.
Good luck for all of us!
I agree with nsx. Touchscreen navigation is missing.
On google Chrome , to go to last or next page, you need only to touch the screen and go to right or left.
This feature is present on Yandex too(Browser based on chome and opera).
I hope it will come quickly on opera