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

Goto URL opera://settings/startPage. You'll see a suggestions option that you can disable (among other things).

Test this solution. Remove the Opera Safe Store password from Keychain Access login item.

Steps:

Open Keychain Access application

Choose 'login' keychain on left

Choose 'Password' group

Find 'Opera Safe Storage' entry, right click it and choose Delete.

You can goto https://addons.opera.com/en/wallpapers/?tag=animated and install one of the animated wallpapers. Then, in Opera, goto the URL opera://about and take note of the "profile" path. Then, close Opera and look in the "themes" folder in the profile folder.

You'll see the folder for the wallpaper you installed. In it, you can see how to create your own. You then just zip up your persona.ini file with the webm file and thumbnail and you 'll have your custom wallpaper.

Things you can try:

Goto the URL opera://about and take note of the "profile" path. Then, close Opera and delete the WidevineCDM folder in the profile folder.

Then, start Opera, goto the URL opera://components, click "update" for Widevine, let it update, and restart Opera.

Then, start Opera and goto https://html5test.com/ and make sure it shows "yes" for h.264 support and "yes" for aac support.

Once that's good, goto https://bitmovin.com/demos/drm, make sure it says "Using Widevine" above the video and "Widevine" for EME below the video, and "video/mp4; codecs="avc1.42c00d" for MSE below the video. And, make sure the video plays and you can hear its audio.

Then, goto the URL opera://settings/siteData, type spotify.com in the search-cookies field and choose "remove all shown".

Then, goto https://open.spotify.com/ in a new tab, log in, and try to play some music.

If you still have problems, goto the URL opera://flags/#reduce-user-agent, enable the flag, restart Opera, and try again.

If you still have problems, goto the URL opera://settings/system, disable hardware acceleration, restart Opera, and try again.

If you still have problems, goto the URL opera://extensions, disable all your extensions, and restart Opera.

If you still ahve problems, make sure you're not using Opera's VPN, and try turning off Opera's Adblocking and tracking protection.

If you still have problems, try all of the above with a standalone installation.

You can also goto the URL opera://settings/content/protectedContent, and make sure "Sites can play protected content" and "Sites can use identifiers to play protected content" are set with no sites in the custom behaviors list.

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.

Log into https://gemini.google.com/app in a tab.

Then, enable the "Custom user sites for browser sidebar" flag at the URL opera://flags/#sidebar-site-panel, restart Opera, click the 3 dots at the bottom of the sidebar, scroll down to Custom Site Panels and add https://gemini.google.com/app.

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.

As an alternative for now, note that you can enable the "Custom user sites for browser sidebar" flag at the URL opera://flags/#sidebar-site-panel, restart Opera, click the 3 dots at the bottom of the sidebar, scroll down to "Custom Site Panels" and add the URL for the web app you want (https://bsky.app/ for example).

You can't customize the icon for it in the sidebar and you can change its position, but it's something for now.

If you have any trouble logging in to the site in the sidebar, you can log in via a regular tab first and then reload the sidebar.

Goto the URL opera://flags/#PasswordImport, enable the import flag and restart Opera. Then, goto the URL opera://settings/passwords, click the 3 vertical dots to the right of "saved passwords" and choose to import the csv file.

For the specific format of the CSV file, export passwords to a csv file from the same opera://settings/passwords 3-dot menu in any Chromium-based browser and look at the CSV file in a text editor.

@andrew84 I see it's like that in the Bookmarks heart menu when hovering over a bookmarks folder too.

@ericssen No.

I'd start by making a copy of your profile folder for a backup. Then, try deleting the "Preferences" file to see if the issue goes away. If not, try deleting the "Local State" file. If still no go, try deleting the "Secure Preferences" file. In short, keep deleting things till the error goes away so you know what file Opera is having an issue with.

Once you figure out what file it is, you can delete the new profile folder and restore the old one using a copy of the backup.

Then, you can try to fix whatever file is the problem. If it's the "Preferences" file, I guess you could load it in JSONedit in tree mode and mess with the root/profile/created_by_version value. And, I guess you can make sure the root/profile/exceptions/pref_version value is 1. For the created version, I guess you can look at it and make sure you run the profile with that specific version. Or, you can try to modify it. Not sure.

That's just a huge guess though and it's also assuming that the file isn't totally corrupted.

Right-click on one of the files and goto "Properties". What's the file for the file? is it ".js" or ".jar"?

@likkm No way to roll back to the old UI now. You can click the Easy Setup button on the address bar and set the preset to "GX Classic" though. That will simulate some of the old UI.

@vladbabinets If you want to try and work around it, goto the URL opera://about, take note of the "profile" path, close Opera and delete the "History" file in the profile folder. Then see if the setting works.

Maybe make a copy of the "History" file first though just in case you want to submit it in a bug if requested.

Not seeing that issue in Opera 118.0.5461.60 64-bit on Windows 11 23H2, for what it's worth.

In addition to making sure Opera is using the GPU that you want, you might need to adjust the Angle flag for your GPU. (Scroll down to the "Opera on Windows Is Slow" section if it doesn't jump automatically. Reddit might might have a bug at the moment with that.)

@camillox It doesn't always help, but you can try the things at https://www.reddit.com/r/operabrowser/wiki/opera/known_issues/#wiki_can.27t_log_in_to_twitch. (Scroll down to the "Can't Log in to Twitch" section if it doesn't jump to it automatically.)

Test things in 118.0.5461.60.

@MjuGen I tried (on Windows 11 23H2) to reproduce it with tab emojis on and cannot. I opened lots of tabs, held down alt and hammered the left-mouse button a bunch of times to keep closing tabs. That's how I reproduced it before the bug fix, but can't reproduce it now.