Goto the URL opera://flags/#search-in-open-tabs, disable the flag, and restart Opera.

I finally got this to happen to me in Opera GX. I then went to the URL opera://settings/system and enabled "Use DNS-over-HTTPS instead of the system’s DNS settings". Then things starting working. I don't know if that's coincidence or not yet though.

In Opera Developer (68), it has been change to a search icon. You can goto the URL opera://flags/#search-in-open-tabs, disable it and restart to get the old behavior back.

Are you using Opera 68?

Disable opera://flags/#search-in-open-tabs.

In the Opera program files directory, right-click on launcher.exe to create a new shortcut and place it on your desktop. Then, on the desktop, rename it what you want. Then, right-click on the shortcut, goto properties and then the "shortcut" tab. On that tab, modify the target to add the --user-data-dir command-line switch.

For example:

"C:\Program Files (X86)\Opera\launcher.exe" "--user-data-dir=C:\Users\yourusername\Opera2"

(I personally have a "My Program Files" folder in "C:\Users\myusername", so I'd use "C:\Users\myusername\My Program Files\Opera2" for example.)

You can create as many shortcuts as you want with each using a different profile folder.

See http://peter.sh/experiments/chromium-command-line-switches/#user-data-dir for more info.

To enable password importing, you need to start Opera with the --enable-features=PasswordImport command-line switch.

For example:

"C:\Program Files\Opera\launcher.exe" --enable-features=PasswordImport

Goto the URL opera://about to see the "install" path to see what the path to your launcher.exe is. You can then run that command in a command prompt or modify the properties of Opera's shortcut to pass that switch to launcher.exe.

Then, in Opera, you can goto the URL opera://settings/importData and import your passwords from Chrome. But, you need to make sure Chrome is closed when you do it.

Or, if you want to import the csv file, you can then goto the URL opera://settings/passwords and the "import" option will be available.

The setup I did for Opera Stable (66) for libffmpeg and Widevine on Linux Mint 19.3 XFCE is this:

• Install Google Chrome and Opera.

• Create "/usr/lib/x86_64-linux-gnu/opera/lib_extra"

• Place libffmpeg.so for Chromium 79 in the "lib_extra" folder. Got it from https://github.com/iteufel/nwjs-ffmpeg-prebuilt/releases/tag/0.43.6.

• Copy "opt/google/chrome/WidevineCdm" to the "lib_extra" folder.

• Edit "/usr/lib/x86_64-linux-gnu/opera/resources/ffmpeg_preload_config.json" to be:

  []
  

• Edit "/usr/lib/x86_64-linux-gnu/opera/resources/widevine_config.json" to be:

    [
        {
           "preload": "/usr/lib/x86_64-linux-gnu/opera/lib_extra/WidevineCdm"
        }
  
    ]
  

• Uninstall Chrome and delete "/usr/lib/chromium-browser" for good measure.

In testing, unlike "lib_extra" for ffmpeg, Opera does not not search for the Widevine lib or the Widevine folder in any other place besides what's in widevine_config.json. It doesn't even search in "~/.config/opera/WidevineCdm".

(See https://forums.opera.com/post/199264 (my reply/question to @jimunderscorep) for why I edited the config files so Opera only searches for its own copies of libffmpeg and widevine.)

The feature was called Instant Search and Opera removed it.

opera://settings/searchEngines

https://translate.google.com/#auto/th/%s as the search URL should work.

Not the same, but you can hit alt + d (or ctrl + l) to focus the address field, type your search and hit alt + enter. Then, you can hit ctrl + w to close the search result page when you're done to go back to where you were.

Of course, you can just do ctrl + t, type, press enter and do ctrl + w after that instead if that's easier. Again, not the same, but...

@opera-user-from-2002 Was it https://addons.opera.com/en/extensions/details/amazon-for-opera/?

Does Mattermost have a normal web page that you can load?

If so, you can add any page you want to the sidebar. Goto the URL opera://flags/#sidebar-site-panel, enable the flag, restart Opera, click the 3 horizontal dots at the bottom of the sidebar, scroll down to "Custom site panels" and add the URL to the Mattermost page.

One workaround is to try this sidebar calculator extension

Another workaround is to add any page you want that has a calculator to the sidebar. Goto the URL opera://flags/#sidebar-site-panel, enable the flag, restart Opera, click the 3 horizontal dots at the bottom of the sidebar, scroll down to "Custom site panels" and add the URL to the page. You could add https://www.google.com/search?q=calculator to the sidebar for example to always get the Google calculator.

@zborbaski: See https://www.reddit.com/r/operabrowser/comments/mlwtgq/sidebar_extensions_blocked_after_upgrade/ for a workaround.

@baloun said:

ERR_BLOCKED_BY_RESPONSE

If you get this, see https://www.reddit.com/r/operabrowser/comments/mlwtgq/sidebar_extensions_blocked_after_upgrade/ for a workaround.

If you get "ERR_BLOCKED_BY_RESPONSE" when trying to load a page, see https://www.reddit.com/r/operabrowser/comments/mlwtgq/sidebar_extensions_blocked_after_upgrade/ for a workaround.

@clappingfetus: See https://www.reddit.com/r/operabrowser/comments/mlwtgq/sidebar_extensions_blocked_after_upgrade/ for a workaround for ERR_BLOCKED_BY_RESPONSE

Even though Opera is based on Chromium, Opera doesn't support any policies in the registry. Therefore, setting group policies won't help. And, an ADMX file won't help. Opera also doesn't provide a bundled download with an ADMX file in it like Chrome does.

Vivaldi does supports its own policies though. I don't think there's an ADMX bundle, but I see https://admx.help/?Category=VivaldiBrowser for example.

Seems like a browser-detection issue. Goto the URL chrome://flags/#freeze-user-agent, enable the flag, restart Opera and try again.

I finally got this to happen to me in Opera GX. I then went to the URL opera://settings/system and enabled "Use DNS-over-HTTPS instead of the system’s DNS settings". Then things starting working. I don't know if that's coincidence or not yet though.