298123 2025-08-29 14:38:47 -0700 dNR: dynamic rules apply to extensions 2025-08-30 11:56:38 -0700 1 1 1 Unclassified WebKit WebKit Extensions Safari 18 All iOS 18 NEW InRadar P2 Normal --- 1 rhill webkit-unassigned opendarwin timothy webkit-bug-importer oldest_to_newest 2139773 0 476562 rhill 2025-08-29 14:38:47 -0700 Created attachment 476562 Minimal MV3 extension Steps to reproduce: Install one or more extensions from the App store. Examples: - uBlock Origin Lite: https://apps.apple.com/us/app/ublock-origin-lite/id6745342698 - Ghostery: https://apps.apple.com/us/app/ghostery-privacy-ad-blocker/id6504861501 Install the attached minimal extension as temporary extension. It will dynamically add the following DNR rule: { "id": 1, "action": { "type": "block" }, "condition": { "urlFilter": ".css" } } First, visit a simple webpage: - https://news.ycombinator.com Result: un-styled content, expected. Next, open the popup panel of one of the previously installed extension from the App store. Result: popup panels render with un-style content, possibly unusable as a result. I tried to reproduce the issue using static ruleset with the same dynamic rule causing issue, and I could not reproduce, so unless I erred in my test, the issue occurs only with dynamic rules. I stumbled on this issue while trying to investigate an issue on the iPad. uBlock Origin Lite offers the ability to manually enter DNR rules, and upon entering a broadly blocking rule as the one above (which would block all secondary resources, not just `css`), this issue caused the extension to brick itself, and also break all other extensions installed. Since the extension was now virtually bricked, there was no way to remove the offending rules since the user interface would not come up, as the background process was also broken. Unexpectedly, uninstalling the extension, force closing the browser, shutting down the device, re-opening the browser then re-installing the extension did not solve the issue -- it appears extension storage is not removed when an extension is uninstalled -- this is another issue unveiled while investigating the issue here. The only recourse was to access the background page with dev tools, then manually removing the problematic DNR rule using the console. 2139774 1 webkit-bug-importer 2025-08-29 14:38:55 -0700 <rdar://problem/159472185> 2139893 2 opendarwin 2025-08-30 11:56:38 -0700 I can reproduce the issue on macOS. In my testing, simply disabling the extension in Safari Extension Settings should disable the DNR rule and stop it from breaking everything. I believe that if you uninstall an extension, Safari does eventually purge the extension's storage after a period of time, but not right away. 476562 2025-08-29 14:38:47 -0700 2025-08-29 14:38:47 -0700 Minimal MV3 extension dnr-issue.zip application/zip 1754 rhill UEsDBBQAAAAAANOKHVsAAAAAAAAAAAAAAAAKACAAZG5yLWlzc3VlL3V4CwABBPUBAAAEFAAAAFVU DQAHHhqyaB4asmgeGrJoUEsDBBQACAAIANOKHVsAAAAAAAAAAAAAAAAUACAAX19NQUNPU1gvLl9k bnItaXNzdWV1eAsAAQT1AQAABBQAAABVVA0ABx4asmgeGrJoZhqyaGNgFWNnYGJg8E1MVvAPVohQ gAKQGAMnEBsBcSEQg/iLGYgCjiEhQVAmSMcMIOZGU8KIEBdNzs/VSywoyEnVKyjKL0vNS8xLTmVg ZGJgVtdQUtvtrw8AUEsHCB+AZOJWAAAAowAAAFBLAwQUAAgACABsih1bAAAAAAAAAAAAAAAAFwAg AGRuci1pc3N1ZS9iYWNrZ3JvdW5kLmpzdXgLAAEE9QEAAAQUAAAAVVQNAAdcGbJoJxqyaFwZsmhN jrEOwjAMRPd+hZUJJFSpa1kREgtD14ohjT1EpE1JnKKqyr+TFCjcdH53ttw5+/TkSiRlpJOsJ7oS N/QI5LkMI0qm0zzIXqsmGPK7pYAsibjONbQfkiQ0ihqqww9IxdoOCS4geB4pOdEZq+4C4l9N2QH1 t7nhNQrOnLVhcnm1VN6LLY+ri7f3IUe9nSg/dcH8FlSQkrg/FsULUEsHCMSTauuaAAAA5QAAAFBL AwQUAAgACABsih1bAAAAAAAAAAAAAAAAIgAgAF9fTUFDT1NYL2Ruci1pc3N1ZS8uX2JhY2tncm91 bmQuanN1eAsAAQT1AQAABBQAAABVVA0AB1wZsmgnGrJoZhqyaGNgFWNnYGJg8E1MVvAPVohQgAKQ GAMnEBsBcSEQg/iLGYgCjiEhQVAmSMcMIOZGU8KIEBdNzs/VSywoyEnVKyjKL0vNS8xLTmVgZGJg VtdQUtvtrw8AUEsHCB+AZOJWAAAAowAAAFBLAwQUAAgACADTih1bAAAAAAAAAAAAAAAAFwAgAGRu ci1pc3N1ZS9tYW5pZmVzdC5qc29udXgLAAEE9QEAAAQUAAAAVVQNAAceGrJoJxqyaB4asmhtjrEO gjAQhvc+RdORGNC4MTszsBpiCpxQlRZ7LQvh3b0WEmJ0ueG7///uZsa5qGXz7KzxuhU5n4kQw8aq 0SGBawRfsfSBItKK5nIIjhbWhjKaOuJSlLz2nYi7QWp1B3S3CSyugXNcaDnAT3oEOygMuf066ZuX tNKpCQpwJbw9+cIPVezsYnFKj6unN3Txr6x3bsQ8y5IsidENbSRI2cI+UEsHCHK4zA6gAAAAGgEA AFBLAwQUAAgACADTih1bAAAAAAAAAAAAAAAAIgAgAF9fTUFDT1NYL2Ruci1pc3N1ZS8uX21hbmlm ZXN0Lmpzb251eAsAAQT1AQAABBQAAABVVA0ABx4asmgnGrJoZhqyaGNgFWNnYGJg8E1MVvAPVohQ gAKQGAMnEBsBcSEQg/iLGYgCjiEhQVAmSMcMIOZGU8KIEBdNzs/VSywoyEnVKyjKL0vNS8xLTmVg ZGJgVtdQUtvtrw8AUEsHCB+AZOJWAAAAowAAAFBLAQIUAxQAAAAAANOKHVsAAAAAAAAAAAAAAAAK ABgAAAAAAAAAAADtQQAAAABkbnItaXNzdWUvdXgLAAEE9QEAAAQUAAAAVVQFAAEeGrJoUEsBAhQD FAAIAAgA04odWx+AZOJWAAAAowAAABQAGAAAAAAAAAAAAO2BSAAAAF9fTUFDT1NYLy5fZG5yLWlz c3VldXgLAAEE9QEAAAQUAAAAVVQFAAEeGrJoUEsBAhQDFAAIAAgAbIodW8STauuaAAAA5QAAABcA GAAAAAAAAAAAAKSBAAEAAGRuci1pc3N1ZS9iYWNrZ3JvdW5kLmpzdXgLAAEE9QEAAAQUAAAAVVQF AAFcGbJoUEsBAhQDFAAIAAgAbIodWx+AZOJWAAAAowAAACIAGAAAAAAAAAAAAKSB/wEAAF9fTUFD T1NYL2Ruci1pc3N1ZS8uX2JhY2tncm91bmQuanN1eAsAAQT1AQAABBQAAABVVAUAAVwZsmhQSwEC FAMUAAgACADTih1bcrjMDqAAAAAaAQAAFwAYAAAAAAAAAAAApIHFAgAAZG5yLWlzc3VlL21hbmlm ZXN0Lmpzb251eAsAAQT1AQAABBQAAABVVAUAAR4asmhQSwECFAMUAAgACADTih1bH4Bk4lYAAACj AAAAIgAYAAAAAAAAAAAApIHKAwAAX19NQUNPU1gvZG5yLWlzc3VlLy5fbWFuaWZlc3QuanNvbnV4 CwABBPUBAAAEFAAAAFVUBQABHhqyaFBLBQYAAAAABgAGADQCAACQBAAAAAA=