• Login
    • Search
    • Categories
    • Recent
    • Tags
    • Users
    • Groups
    • Rules
    • Help

    Do more on the web, with a fast and secure browser!

    Download Opera browser with:

    • built-in ad blocker
    • battery saver
    • free VPN
    Download Opera

    Opera 121.0.5600.0 developer update

    Blogs
    desktop blog comments
    11
    25
    460
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • Opera Comments Bot
      Opera Comments Bot last edited by

      Hello! We’ve just rolled out a new update to Opera Developer – version: 121.0.5600.0, and here’s what’s new in this release: For a complete rundown, take a look at the changelog. As always, thank you for testing and helping improve Opera. Installation links:

      Read full blog post: Opera 121.0.5600.0 developer update

      Reply Quote 0
        1 Reply Last reply
      • burnout426
        burnout426 Volunteer last edited by

        At opera://about, the update downloaded fine, but I got a "Failed to prepare update" error. I refreshed the page and the same thing happened. I then closed Opera and it hosed by install. Specifically, I get a side-by-side configuration issue when launching opera.exe directly (as the shortcut would no longer work even though there were no Opera processes still running) due to the replacement of the old opera.exe not finishing properly.

        Will uninstall and use the installer and report back.

        Reply Quote 0
          burnout426 andrew84 2 Replies Last reply
        • burnout426
          burnout426 Volunteer @burnout426 last edited by burnout426

          @burnout426 said in Opera 121.0.5600.0 developer update:

          Will uninstall and use the installer and report back.

          Uninstall entry was missing. Deleted the install folder and tried installing with the net installer. That failed. Downloaded the offline installer (from the link in the installer error) and it worked, but it installed the older build.

          Reply Quote 0
            1 Reply Last reply
          • burnout426
            burnout426 Volunteer last edited by

            Downloaded the offline installer directly from https://ftp.opera.com/pub/opera-developer/121.0.5600.0/win/ and that fails too.

            Reply Quote 0
              1 Reply Last reply
            • burnout426
              burnout426 Volunteer last edited by burnout426

              Just get this in the log:

              [0721/083921.093:INFO:opera\desktop\windows\installer\installation_package_impl.cc:172] Package is ready
              [0721/083921.108:INFO:opera\desktop\windows\installer\steps\installer_steps.cc:482] Removing installed files.
              [0721/083921.108:INFO:opera\desktop\windows\installer\steps\delete_file_step.cc:32] Deleting file C:\Program Files\Opera developer\121.0.5600.0\files_list
              [0721/083921.109:INFO:opera\desktop\windows\installer\steps\delete_file_step.cc:32] Deleting file C:\Program Files\Opera developer\121.0.5600.0\root_files_list
              [0721/083921.110:INFO:opera\desktop\windows\installer\steps\installer_steps.cc:569] Removing old files from installation root
              [0721/083921.134:ERROR:opera\desktop\windows\installer\transactions\delete_file_operation.cc:102] Attempt to open the file for writing failed: The process cannot access the file because it is being used by another process. (0x20)
              [0721/083921.134:ERROR:opera\desktop\windows\installer\transactions\delete_file_operation.cc:106] File removal failed
              [0721/083921.148:INFO:opera\desktop\windows\installer\steps\clean_registry_step.cc:47] Cleaning up registry
              [0721/083921.158:INFO:opera\desktop\windows\installer\steps\installer_steps.cc:246] Setting up the registry
              

              The Opera developer folder is empty. From the log, it looks like it's trying to delete files that aren't there yet.

              Reply Quote 0
                1 Reply Last reply
              • burnout426
                burnout426 Volunteer last edited by burnout426

                Standalone installation option works at least (to a fresh folder on my desktop). The current user and all users options fail.

                Reply Quote 0
                  1 Reply Last reply
                • Dudikoff
                  Dudikoff last edited by

                  Standalone fail https://ftp.opera.com/pub/opera-developer/121.0.5600.0/win/

                  Reply Quote 1
                    1 Reply Last reply
                  • andrew84
                    andrew84 @burnout426 last edited by andrew84

                    @burnout426 said in Opera 121.0.5600.0 developer update:

                    "Failed to prepare update"

                    The same here.
                    2025-07-21_171256.png

                    Also, according to the changelog it seems they decided to skip 136 version and update directly 135 > 137

                    I have no wish experimenting with all these installers, I just leave all the things broken.

                    Reply Quote 1
                      1 Reply Last reply
                    • erdinc53
                      erdinc53 last edited by

                      This update broke my browser, won't open.

                      Reply Quote 0
                        SiMcarD78 1 Reply Last reply
                      • SiMcarD78
                        SiMcarD78 @erdinc53 last edited by

                        @erdinc53: almost nobody managed to update

                        Reply Quote 0
                          erdinc53 1 Reply Last reply
                        • erdinc53
                          erdinc53 @SiMcarD78 last edited by

                          @SiMcarD78 I managed to download it, but the browser crashed.

                          Reply Quote 0
                            1 Reply Last reply
                          • ralf-brinkmann
                            ralf-brinkmann last edited by

                            Okay, I'm the exception. I have Opera installed as standalone version and I updated with the normal Opera_Developer_121.0.5600.0_Setup_x64.exe without problems.

                            81768d25-e37f-45e0-82f2-19f7c39de9dd-image.png

                            Reply Quote 0
                              leocg 1 Reply Last reply
                            • SiMcarD78
                              SiMcarD78 last edited by

                              I was expecting a fixed release today.

                              Reply Quote 0
                                1 Reply Last reply
                              • newton2346
                                newton2346 last edited by

                                It also stopped working here after updating, but I accessed the installation folder and changed the executable "opera.exe" to "opera.exe.new" and "opera.exe.old" to "opera.exe". Then it ran normally.

                                Reply Quote 0
                                  leocg andrew84 2 Replies Last reply
                                • leocg
                                  leocg Moderator Volunteer @ralf-brinkmann last edited by

                                  @ralf-brinkmann The standalone version updated fine here too.

                                  When I try to update or even install the regular installation, an error happens.

                                  Reply Quote 0
                                    1 Reply Last reply
                                  • leocg
                                    leocg Moderator Volunteer @newton2346 last edited by

                                    @newton2346 How did you update?

                                    Reply Quote 0
                                      1 Reply Last reply
                                    • newton2346
                                      newton2346 last edited by

                                      @leocg: It had updated automatically but it gave an error when opening as reported by other users, so I did the procedure I mentioned above.

                                      Reply Quote 0
                                        1 Reply Last reply
                                      • ralf-brinkmann
                                        ralf-brinkmann last edited by

                                        I noticed something else strange:
                                        When I open the list of recently closed pages, I used to be able to click on an entry in the list with the mouse and the page would open right there. This doesn't work now. The page doesn't open, and I land on the first open tab. However, if I move the blue highlight bar up to the desired entry with the keyboard and press ENTER, the page opens.

                                        W11x64, Opera x64 (standalone installation)

                                        Reply Quote 0
                                          1 Reply Last reply
                                        • ralf-brinkmann
                                          ralf-brinkmann last edited by

                                          And one more thing:

                                          ca977834-9111-4d8e-a2e0-dbf69deac1b7-image.png

                                          This version of Opera shows me 7 unread news in the Facebook tab, but there are no unread news. Back to Opera 121.0.5593.0 Developer the problem is solved.

                                          35a0183e-658d-40ba-85bb-5dcca22a01ee-image.png

                                          Reply Quote 0
                                            ralf-brinkmann 1 Reply Last reply
                                          • sgunhouse
                                            sgunhouse Moderator Volunteer last edited by

                                            I gather they pulled the update. When I checkjed a few minutes ago it said I was up to date and I still have the old version number.

                                            Reply Quote 0
                                              1 Reply Last reply
                                            • First post
                                              Last post

                                            Computer browsers

                                            • Opera for Windows
                                            • Opera for Mac
                                            • Opera for Linux
                                            • Opera beta version
                                            • Opera USB

                                            Mobile browsers

                                            • Opera for Android
                                            • Opera Mini
                                            • Opera Touch
                                            • Opera for basic phones

                                            • Add-ons
                                            • Opera account
                                            • Wallpapers
                                            • Opera Ads

                                            • Help & support
                                            • Opera blogs
                                            • Opera forums
                                            • Dev.Opera

                                            • Security
                                            • Privacy
                                            • Cookies Policy
                                            • EULA
                                            • Terms of Service

                                            • About Opera
                                            • Press info
                                            • Jobs
                                            • Investors
                                            • Become a partner
                                            • Contact us

                                            Follow Opera

                                            • Opera - Facebook
                                            • Opera - Twitter
                                            • Opera - YouTube
                                            • Opera - LinkedIn
                                            • Opera - Instagram

                                            © Opera Software 1995-