I resolve recurring doubts

No. It only makes some pages harder to open on a device you configured. Harm can continue through money already spent, another phone, or distress that has nothing to do with DNS. I point adults toward the National Council on Problem Gambling, and toward SAMHSA and MedlinePlus for broader public-health reading, and I call that a starting point rather than care. More of that split is on safer boundaries.

The rule lives inside one browser profile. A second browser, an installed app, a phone on cellular data, or another person’s device never loads that profile. I map those paths before I trust an extension. The comparison sits on access layers.

Often the manifest shape is similar, because both use WebExtensions, but keys and temporary-load screens differ. I show a static Manifest Version 3 sketch and ask you to confirm it against Mozilla’s and Chromium’s own docs. I do not ship a packed add-on. See the local build.

I will not. Naming operators would turn a private boundary into a directory, and any directory goes stale. You already know the names you want off your own machine. Put those in your local rules file, and do not fetch a remote list you have not read.

DNS blocks a name lookup. IPv4 and IPv6 are address families; a rule for one does not cover the other. An app that skips DNS can ignore a name block entirely. I keep a gap table on gap checks and I do not explain how to route around a filter.

It can cover more than one browser on Windows or macOS, which is useful, and it is still editable by an administrator, which is a limit. It does not follow a phone, and a v4-only line can miss IPv6. I treat it as a sibling of the extension, not as a seal.

OWASP warns that client-side controls are not a security boundary for applications. I borrow that caution: if you can disable the add-on, it is not enforcement. It can still reduce accidental clicks. It cannot hold a person who is determined and has another device.

It will not. The pages are static files. There is no proxy, no extension download that activates itself, and no account that could apply a policy. Anything that blocks traffic has to be installed by you, on your device, from files you can read.

Use the draft page. It builds text in your browser and does not send it. You can copy or download the draft and decide later what to do with it. I do not ask for a name, a phone number, or payment details.

No. Legal age and lawful products vary by place, and I do not state a single national age I cannot stand behind for every jurisdiction. Health and money decisions belong with qualified professionals. If you are in immediate danger, contact local emergency services rather than editing a filter.