Opera 121.0.5544.0 Developer Edition

Opera 121 is a fast and free alternative web browser, based on Chromium and Blink (the rendering engine used by Chromium). It includes tabbed browsing, pop-up blocking, integrated searches.

Opera 121 has come up with bigger guns to enter the race for the most popular web browser, as the current leading role is played between Google Chrome, Firefox and Microsoft Edge.

This web browser has one intuitive, powerful location for searching and navigating the web. Search using multiple providers and view site suggestions as you type. The Discover feature gives you top-quality news and entertainment from around the globe.

Moreover, Opera 121 also has the advanced functions such as Opera Mail program. It is the lightweight, customizable mail client that refines your email experience.

Opera 121 Browser Features:

Anti-Bitcoin mining tool

The browser comes with an innovative anti-Bitcoin mining tool. It also displays security badges, which give you a quick glance at the security of a page. If the browser’s Fraud and Malware Protection detects anything potentially dangerous, it will display a popup to warn you.

Blocker

Enjoy cleaner and smoother browsing with less distractions. Ad Blocker protects your privacy and speeds up your browsing on both mobile and desktop.

AI

Chat with AI on desktop and mobile in Opera Browser. ChatGPT and Aria, Opera’s free and unlimited browser AI, are seamlessly integrated into your browser.

Messengers

Easily use your favorite messengers and social apps while browsing the web. WhatsApp, Instagram, Twitter and more are built right into your sidebar.

VPN

Browse privately using Opera’s built-in, free VPN on desktop and mobile. Or even subscribe to VPN Pro to get enhanced protection for your entire device.

Flow file sharing

Instantly send files, links and notes between your devices.

Sync data

Synchronize Opera Browser between all of your devices. If you install Opera browser for Android or iOS mobile and for Desktop on your computer, you can see cross-device syncing in action. Make some bookmarks on your computer and see them appear on your Android or iOS phone.

Music Player

A world of music and podcasts at your fingertips. H.264 video and MP3 Audio is widely used on the internet. Therefore, with Opera Browser you will have native access to such content.

Opera Wallet

Make secure crypto transactions with a built-in crypto wallet.

Pinboards

A world of music and podcasts at your fingertips.

Integrated PDF viewer.

In addition, Opera has integrated a fast PDF Viewer directly into the browser so you can keep reading without changing applications.

Video pop out.

Allows you to shift your video frame to the side of your screen, so you can truly multitask. Browse, shop online or do the research without missing out on the video action.

RSS in personal news.

RSS support makes the built in newsreader even more customizable.

VR Player Support

Opera is the first browser to support 360-degree videos in virtual reality headsets! It has a built-in VR 360 player for leading headsets, such as HTC Vive, Oculus Rift and other OpenVR compatible devices. That unlocks the immersive world of 360-degree videos for Opera users.

Changes in Opera 121.0.5544.0 Developer:

• CHR-9995 Update Chromium on master to 135.0.7049.42
• DNA-119134 Crash at views::ViewAXPlatformNodeDelegate::FireNativeEvent
• DNA-119349 [Split screen] Restoring tabs opens split screen tabs as tab island
• DNA-121111 [Tab Island Split Screen] Add context menu option to move out of tab island for split screen in tab island
• DNA-121260 Disable background music during Google Meet call
• DNA-121786 SD tile colors are reversed in dark mode and light mode
• DNA-121967 Create UT for title_change_based_notifications.cc file
• DNA-122046 Enable split-screen-in-tab-island on all streams
• DNA-122120 Split screen group is destroyed after moving group and another tab to a new window
• DNA-122130 Chromium warning dialog in settings
• DNA-122186 Custom JS code in snippets
• DNA-122201 [Meet][Player] After closing ‘Present now’ popup music from player starts playing
• DNA-122256 Custom snippets can only be used in opera internal filter lists
• DNA-122260 [VPN] The VPN icon disappears after focusing the address bar
• DNA-122275 Add tooltip to “On exit” part in settings
• DNA-122290 Bookmarks are visible behind split screen
• DNA-122291 [MacOS] Disable the ‘Developer Tools’ option in the macOS toolbar when tabs are opened in split screen mode.
• DNA-122357 [Win] Scrollbar uses outdated design
• DNA-122360 VideoPictureInPictureWindowControllerBrowserTest.ControlsVisibility fails on Linux
• DNA-122363 Showing split screen as one tab in tab cycler no longer works after enabling #split-screen-in-tab-island
• DNA-122365 Extra ‘&’ symbol displaying in bookmarks subfolder names
• DNA-122366 Fix tab island dragging scenarios after CHR-9995
• DNA-122367 Add Split Screen restrictions on auto-PiP
• DNA-122368 GX tokens doesn’t refresh on theme change
• DNA-122372 Update dynamic themes list with viking
• DNA-122377 In-house translations for on-exit tooltip
• DNA-122378 Change UA for finra.org
• DNA-122379 Crash at opera::VpnProServiceFactory::BuildServiceInstanceForBrowserContext
• DNA-122383 Remove std::to_string occurrences from Opera repository
• DNA-122390 Remove std::function occurrences from Opera repository
• DNA-122394 [Mac] DCHECK at thread_restrictions.cc(102)
• DNA-122395 [Clear browsing data on exit] Tooltip for “on exit” does not match design
• DNA-122396 Stuck on loading chrome extension pages
• DNA-122401 DumpWithoutCrashing at sql::(anonymous namespace)::RecordOpenDatabaseFailureReason(const class std::__Cr::basic_string& const, sql::(anonymous namespace)::OpenDatabaseFailedReason)
• DNA-122402 Enable #easy-setup-react on all streams
• DNA-122407 [Split screen] Drop area is not shown when moving mouse to other side of split screen view
• DNA-122408 Register News categories and languages prefs for stat recording.
• DNA-122409 [Clear browsing data on exit] Update the style for dark theme tooltips
• DNA-122410 Google information in delete browsing data section
• DNA-122411 Backport fix for CVE-2025-4664
• DNA-122431 Manifest v2 extensions are disabled after Opera restart
• DNA-122490 Remove std::bind occurrences from Opera repository
• DNA-122503 [Opera One] Enable token support without the flag
• DNA-122504 Paypal entry in siteprefs.json is causing users to not be able to sign in
• DNA-122520 [VPN Pro] Download subscription after enabling #vpn-pro-v4-support flag
• DNA-122522 Enable #split-screen-toolbar on all streams
• DNA-122531 Bump major version to 121

Homepage – https://www.opera.com

Opera System Requirements:

Windows

• Windows 10 or later
• Intel Pentium 4 / AMD Athlon 64 processor or later with support for SSE2

Mac

• macOS 10.13 or later

Linux

• 64-bit Ubuntu 16.04 or later
• Intel Pentium 4 / AMD Athlon 64 processor or later with support for SSE2

Size: 113 MB

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