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Crash at metrodreamin.org on Firefox #4165
Description
Prerequisites
- I verified that this is not a filter list issue. Report any issues with filter lists or broken website functionality in the uAssets issue tracker.
- This is NOT a YouTube, Facebook or Twitch report. These sites MUST be reported by clicking their respective links.
- This is not a support issue or a question. For support, questions, or help, visit /r/uBlockOrigin.
- I performed a cursory search of the issue tracker to avoid opening a duplicate issue.
- The issue is not present after disabling uBO in the browser.
- I checked the documentation to understand that the issue I am reporting is not normal behavior.
I tried to reproduce the issue when...
- uBO is the only extension.
- uBO uses default lists and settings.
- using a new, unmodified browser profile.
Description
uBlock Origin crashes at metrodreamin.com (it turns out the website can crash the whole tab, but uBO crashes before the whole tab crashes; the extension remains usable in the remaining tabs
A specific URL where the issue occurs.
metrodreamin.com
(map editor/viewer view, open *any* large map)Steps to Reproduce
- shift+right click to block the ad frame
- uBlock Origin crashes
- selector returns an empty list of available items
Expected behavior
no crash
Troubleshooting information
uBlock Origin: 1.75.0
Firefox: 159 (beta)
filterset (summary):
network: 1984085
cosmetic: 278194
scriptlet: 75124
html: 4273
listset (total-discarded, last-updated):
added:
https://curbengh.github.io/urlhaus-filter/urlhaus-filter-online.txt: 106907-0, 4h.8m
https://fanboy.co.nz/fanboy-turkish.txt: 725-0, 24d.1h.12m
https://filters.adtidy.org/extension/ublock/filters/3.txt: 350987-197, 4d.17h.29m
https://filters.adtidy.org/extension/ublock/filters/5.txt: 15-0, 4d.17h.29m
https://gist.githubusercontent.com/gorhill/ef1b62d606473c68d524/raw/f8181faac18cb5172c7c9bca8e5a3b22f0c925d0/gistfile1.txt: 6-0, 1d.20h.27m
https://gitlab.com/huzunluartemis/TurkishAdblockList/-/raw/main/src/BadIpList.txt: 14-2, 11h.58m
https://gitlab.com/huzunluartemis/TurkishAdblockList/-/raw/main/src/HostsList.txt: 9872-126, 11h.58m
https://gitlab.com/magnolia1234/bypass-paywalls-clean-filters/-/raw/main/bpc-paywall-filter.txt: 0-0, never
https://neuter.mchang.xyz/filter/sponsorblock: 46-0, 11h.58m
https://raw.githubusercontent.com/DandelionSprout/adfilt/master/AntiBadCapitalismList.txt: 442-0, 16h.2m
https://raw.githubusercontent.com/DandelionSprout/adfilt/master/AntiFunctionalityRemovalList.txt: 41-0, 4d.14h.20m
https://raw.githubusercontent.com/DandelionSprout/adfilt/master/Dandelion%20Sprout's%20Website%20Stretcher.txt: 340-0, 8h.55m
[34 lists not shown]: [too many]
default:
user-filters: 78-7, never
ublock-filters: 55126-255, 4d.17h.28m
ublock-badware: 10384-98, 1h.53m Δ
ublock-privacy: 4161-514, 1h.53m Δ
ublock-unbreak: 2902-71, 1h.53m Δ
ublock-quick-fixes: 704-15, 1h.53m Δ
easylist: 90452-17599, 1h.53m Δ
easyprivacy: 56843-38848, 16h.2m
urlhaus-1: 112060-105178, 4h.8m
plowe-0: 3549-3204, 2d.19h.42m
TUR-0: 14226-259, 4d.17h.27m
filterset (user): [array of 81 redacted]
trustedset:
added: [array of 58 redacted]
removed:
moz-extension-scheme
switchRuleset:
added: [array of 2 redacted]
hostRuleset:
added: [array of 70 redacted]
userSettings:
advancedUserEnabled: true
userFiltersTrusted: true
hiddenSettings:
allowGenericProceduralFilters: true
autoUpdateAssetFetchPeriod: 10
autoUpdateDelayAfterLaunch: 600
filterAuthorMode: true
trustedListPrefixes: ublock- user- adguard- easylist-
updateAssetBypassBrowserCache: true
supportStats:
allReadyAfter: 3826 ms
maxAssetCacheWait: 2328 ms
cacheBackend: indexedDB
Activity
stephenhawk8054 commentedon Oct 17, 2026
Please do the report properly.
You are using too many lists and a heavily modified uBO configuration. Test again in a new browser profile with only uBO and its default settings.
I can't access this domain. Its DNS resolves to nothing: https://dns.google/query?name=metrodreamin.org
Please list the steps to reproduce in the most details as possible, step-by-step, for anyone who only knows this site for the first time. Don't assume everybody is familiar with your site. Don't use
anyword in the steps to reproduce.gorhill commentedon Oct 17, 2026
Navigating to
https://metrodreamin.org/I get "Server Not Found / Firefox can’t connect to the server at metrodreamin.org."freezer2022 commentedon Oct 17, 2026
OP most likely meant
https://metrodreamin.com.But yes, it's the OP's fault: his steps are too vague, they lack of exact URLs, also it's missing an indication of which exactly ad they mean, and his uBO config is overloaded.
By the way: https://github.com/gorhill/uBlock/wiki/Can-uBO-crash-a-browser%3F
gorhill commentedon Oct 17, 2026
Given the severity of the misconfiguration as per troubleshooting and the improperly fulfilled prerequisite steps, I close this issue as invalid.