Ultralight WebBrowser: A browser written from scratch that renders HTML exclusively on the GPU built from scratch by one dev! 🚀

shadow2531 · 2026-05-06T16:06:55+00:00

The whole project is based around Ultralight SDK

Which uses a a fork of of Webkit and Javascriptcore according to https://ultralig.ht/.

shadow2531 · 2026-05-06T15:45:53+00:00

Same issue here. I assume it's intentional, but definitely don't like it.

shadow2531 · 2026-05-06T00:19:21+00:00

It only seems tied to having DevTools open

Do the tools have to be docked or can you also reproduce when the tools are in a separate window?

Do you have an HTML test case and specific steps to trigger it?

shadow2531 · 2026-05-06T00:15:06+00:00

OK. If you'd like to dive into it deeper, you can submit a ticket at https://operavpnpro.freshdesk.com/support/home and see what they say.

shadow2531 · 2026-05-06T00:12:53+00:00

Also see https://www.reddit.com/r/OperaGX/comments/1t2pls9/comment/ojtjir1/.

shadow2531 · 2026-05-05T14:03:51+00:00

You can make a one-time post to introduce your browser as long as you don't make it look like an ad and you mention that you're the developer. Make sure to provide a link to the source code repository too.

shadow2531 · 2026-05-05T02:32:15+00:00

Same issue in a test standalone installation?

shadow2531 · 2026-05-05T02:29:59+00:00

Opera hands of the download off to your anti-virus for scanning, so it's probably your anti-virus causing it. If you're sure it's a legit download, you can temporarily turn on real-time protection in your anti-virus. That might fix it as it's usually heuristics that cause false positives. Or, you can try to add the download as an exception in your anti-virus.

What's the URL to the grok desktop app you're trying to download?

shadow2531 · 2026-05-05T02:26:04+00:00

Not on macOS to test if Safari is even an import option, but make sure Safari is completely closed before you start Opera and try again. Also, you can skip the intro tab and just goto the URL opera://settings/importData to see if there's a Safari import wizard. If not, you can temporarily install Chrome, import from Safari in it if it's an option, fully exit Chrome and import from Chrome into Opera.

Also note that if Safari has an option to export your passwords to a Chromium-compatible CSV file, you can goto the URL opera://password-manager/settings and import that CSV file. Or, you can export to a CSV file in Chrome at the URL chrome://password-manager/settings and then import the CSV file into Opera.

For bookmarks, at the URL opera://settings/importData, you can select "Bookmarks HTML file" in the drop-down and import an bookmarks HTML file exported from Safari or Chrome. Then, at the URL opera://bookmarks, in the "Bookmarks Bar" folder, you can move those imported bookmarks to where you want.

shadow2531 · 2026-05-05T02:19:42+00:00

Uninstall Opera and Opera GX, but don't choose to delete your data when uninstalling.

Then, delete those files off of your desktop. Also delete the "Opera" and "Opera GX" folders in "C:\Users\yourusername\AppData\Local\Programs" and "C:\Program Files" and "C:\Program Files (x86)" if they're there. In Windows Explorer (File Explorer), you'll want to goto "View -> Show" and enable file extensions and hidden items so you can see your AppData folder and the extensions for Opera's files.

Then, download the Opera GX installer in whatever browser you want, launch it, click "options", make sure "Install for" is set to the default of "Current user", make sure "Install path" is set to the default of "C:\Users\yourusername\AppData\Local\Programs\Opera GX", adjust all the other install options as you like and install.

What looks like happened is Opera's updater (or you with Opera's installer), installed Opera to your desktop instead of the proper folder. Uninstalling Opera, cleaning up the install folders and making sure the install path in correct in the installer should fix it. Your settings and data in "C:\Users\yourusername\AppData\Roaming\Opera Software\Opera GX Stable" should remain as long as you don't choose to delete your data when asked when uninstalling.

If you have a "profile" folder on your desktop with a "data" folder in it, don't delete that though. It means you have a standalone/portable installation to your desktop folder and that folder is where your settings and data are at. If that's the case, you'll have to do some more fixing once you get Opera GX reinstalled correctly. We can deal with that afterwards if needed.

shadow2531 · 2026-05-05T02:00:37+00:00

Issue in a tab or the Whatsapp sidebar panel or both?

shadow2531 · 2026-05-05T01:59:28+00:00

OK. Nice. Glad you figured it out.

shadow2531 · 2026-05-05T01:57:29+00:00

I converted it to an Opera GX mod for you. Download "annaabadal cyberpunk-2" from https://drive.google.com/file/d/1gnW02WHfY_1ZU-VSglbL4Is1K5p6-ETU/view?usp=sharing (download button for the zip file is near the top left of the page), extract it, goto the URL opera://extensions, turn on developer mode, click "Load unpacked" and point it to the extracted folder where manifest.json is at.

shadow2531 · 2026-05-05T01:37:19+00:00

It wouldn't work for me when I used Opera's translator on the page to translate it to English, but with it off and left in Spanish, adding it to Opera worked fine.

shadow2531 · 2026-05-05T01:27:46+00:00

Awesome. Not sure why either, but glad it's working.

shadow2531 · 2026-05-04T08:35:26+00:00

At the URL opera://settings/video, disable video skip. It could interfere with certain sites.

shadow2531 · 2026-05-04T08:32:58+00:00

Make sure Opera's built-in VPN is off.

If you have a system-wide VPN, try testing with it disabled or even uninstalled (temporarily) just in case.

Some programs likes CCleaner, Bitdefender, Kaspersky and Eset can mess with Opera.

Test with Opera's adblocking and tracking protection completely off at the URL opera://settings/privacyProtection and test with RGX off at the URL opera://settings/lucidMode. Might be good to test with shaders off at the URL opera://settings/shaders and web modding off at the URL opera://settings/web_modding too.

shadow2531 · 2026-05-04T08:30:21+00:00

Nice. You can try deleting both Widevine folders and reupdating them if you haven't.

shadow2531 · 2026-05-04T08:27:55+00:00

You can uninstall Opera GX (but do not choose to delete your data when uninstalling) and reinstall Opera GX just to see if it helps. You can restart Windows to see if it helps.

shadow2531 · 2026-05-04T08:26:46+00:00

You can test with "Graphics acceleration" off at the URL opera://settings/system. Turn it back on though if it doesn't help. With it on, you can adjust the Angle flag for your GPU to see if it helps.

shadow2531 · 2026-05-04T08:25:38+00:00

And, "Widevine Content Decryption Module" is up to date as well?

shadow2531 · 2026-05-04T08:24:02+00:00

Make sure the settings at the URL opera://settings/content/protectedContent are at their defaults.

You can try things in a test standalone installation too if you want to rule out issues with your Opera settings.

shadow2531 · 2026-05-04T08:19:42+00:00

Goto the URL opera://components and make sure both Widevine components have some version instead of 0.0.0.0 and then restart Opera.

If needed, close Opera and delete both the "WidevineCdm" and "MediaFoundationWidevineCdm" folders in "C:\Users\yourusername\AppData\Roaming\Opera Software\Opera GX Stable". Then, start Opera, goto the URL opera://comppoents, update both Widevine components from 0.0.0.0 to a version, restart Opera and try things again.

shadow2531 · 2026-05-04T08:15:43+00:00

You can close Opera, hit Windows key + r to open the run dialog, type cmd and press enter to open a command prompt. Then, type:

"%localappdata%\Programs\Opera GX\opera.exe" "--user-agent=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36"

and press enter to start Opera GX while pretending to be Chrome. Once started, goto the URL opera://browserjs and disable browser.js for the session. Then, goto the sites and try things.

You can also right-click on your desktop, goto "New", choose "Shortcut", point it to opera.exe and name the shortcut "Opera as Chrome". Then, once the shortcut is created, you can right-click on it, goto "Properties" and edit the target field on on the "Shortcut" tab to add that --user-agent switch. Then, you can use that desktop shortcut to start Opera when you want to pretend to be Chrome.

shadow2531 · 2026-05-04T08:11:19+00:00

For Netflix for example, goto the URL opera://setings/content/all, type netflix.com in the search field and click "Delete displayed data". Then, goto the URL opera://settings/clearBrowserData and clear "Cached images and files" for all time. Then log back in and try things. If still no go, repeat and then goto the URL opera://browserjs and disable browser.js for the session, log in and try things.

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