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I haven't experienced a crash, but I'm having the same problem where no web pages will load at all with uBlock Origin enabled. (I just started using UBO today so I don't know if it would have ever previously worked.)

In addition, once it's in this state, I can't disable UBO without first closing out Orion and re-opening it. If it's stuck on loading a page, the extension refuses to be disabled.

Also, clicking on the extension icon does nothing; there is no options dialog at all, not even an empty one.

Version 0.99.127.2-beta (WebKit 619.1.1)
MacBook Pro (macOS Sonoma 14.4.1 build 23E224)

Getting uBlock Origin to work at 100% should have been a priority from the very start

As good as the internal content blocker is it will never deliver the same flexibility and blocking capability as uBO

When uBO works as good as it does in Firefox I will make Orion my daily driver browser

    Just tried the new Orion update (0.99.127.3-beta (WebKit 619.1.1)) and it's still crashing, and infinitely loading websites with uBlock Origin enabled.

    • dino replied to this.

      frin is this reproducible on new clean profile too?

      • frin replied to this.

          dino interestingly, it's not reproducible in a new clean profile.

          You gave me an idea, I uninstalled uBlock Origin in my main profile, then reinstalled it. It is loading websites normally now, and disabling uBlock Origin no longer crashes Orion.

          Still, hopefully you can fix the crash bug for anyone else who might be experiencing the issues.

            I had the same issue (crashes on disabling, impossible loading of any pages), on the lastest non-paid version of the beta browser (updated few minutes ago). Sent a crash report via the automatic pop-up on browser's restart.
            I'll try to uninstall / fresh install uBlock Origin, as it seems to have worked with @frin ...
            I hope for a fix, but it is all i can do (i am code illiterate 🙂 ..
            nice day to all

            7 months later
            Merged 7 posts from Orion crash when disabling uBlock Origin.

              I installed uBlock Origin 1.45.2 (both Add-on and Extension) on Orion Browser 1.2 (iOS) there was an error showing that uBlock Origin's interface was dark, not seeing the options of uBlock Origin clearly.
              Hope Dev will fix the above error soon.
              I thank you!
              Option
              Menu

                uBO isnt fully suported on iOS

                  2 years later
                  Merged 2 posts from Error displayed on uBlock Origin.
                    2 months later

                    _I_

                    I can't believe this issue still exists, four years later after it's been flagged.

                    I just tried Orion again. I tried a new profile. I tried a clean install of uBo. The exact same error persists.

                    • Ads are shown, and cosmetic filters are not applied, until the page is refreshed.
                    • Steps for reproduction: more than ten of us have provided them in this thread. There are in depth text steps. There are videos.

                    Fixes to the bug were 'planned for next release' in July of 2023.

                    @Vlad said in November 2023 that uBO not blocking ads on page load is new information to him.

                    catch-22 replied saying this has been the exact issue since 2021.

                    As Anatomy5803 said, this is the highest voted bug in Orion.

                    It's 2025, this thread is now derailed with people talking about how uBO doesn't work on the iOS version of Orion. It's still not fixed on the MacOS release after four years.

                    We get it - beta, small team, limited resources. But this has been known for a long time. We've all gone out of our way to show different ways to reproduce it.

                    I don't think it's crazy to ask if there are plans to address this issue, as it approaches its fifth birthday.

                          vapor

                          I noticed that for me it was only happening on a new tab/window.
                          So I changed "new window/tab open with" from Start Page to Empty Page, which seems to have fixed it.

                          Could also reproduce it again by switching it back to Start Page.
                          It does not matter if you click on something on the start page or manually enter something in the URL bar.
                          Looks like loading a page from the Start Page breaks the adblockers somehow.

                          I've just tested this out and and it works for me too. uBO works with adblock and cosmetic blockers if a page is opened from a blank page.

                          However, if the site is opened from the Start Page, or any other webpage, the problem as described (needing to refresh the page before uBO will block ads and apply cosmetic filters) persists.

                          Edit: Just tried on the latest Orion+ RC. Issue persists.

                              newtoorion unfortunately it doesn't seem to be a priority as they're focussing on the built-in adblocker. It puzzles me a bit as I don't get why you wouldn't just support the golden standard in adblocking and be done with it, especially when Orion's USP has always been being able to install Chrome/Firefox extensions.

                                The built in adblocker that Orion is working on should also provide better performance than uBlock Origin. uBlock Origin uses its own network filtering engines through the webRequest API, whereas Orion's built in adblocker converts filter list syntax rules to WebKit based content blocking rules (json format) which are internally represented as a deterministic finite state machine which is in linear time, other "advanced" rules are executed in scriptlets and/or extended css. But given that, the team will be moving away from using AdGuard's scriptlets/extended-css as well as their SafariConverterLib because they're GPLv3 licensed, so they will have to create or find another alternative which is a huge challenge.

                                This brings us back to where we started, once the team removes the native ad-blocking feature, unless they find a replacement quick enough, which is a huge gigantic endeavor, uBlock Origin will be your best bet. But for now, the built in ad-blocker is good, albeit it will be replaced and re-written.

                                  4 days later

                                  Anatomy5803

                                  Thanks, this makes a lot of sense.

                                  I added my custom filters and adlists to the native blocker - it's a bit of a pain, and it's definitely harder to just hide an annoying element. But at least it works.

                                  Just out of interest, why will the team have to remove this internal adblocker and rebuild it?

                                  And if so... why not just work on getting uBO working as it does on Chromium/Firefox based browsers? As a lay person, this is very confusing.

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