The short answer
If you want to limit Chrome extensions to the sites you choose, start from the extensions you actually installed and decide, one by one, whether each needs to run everywhere or only on specific sites. Chrome exposes site-access choices for eligible extensions, and the practical job is to match each extension to the sites where it earns its place. This guide is about extension permissions, not about account-login sessions; keep the two separate so you do not confuse a site permission with a logged-in account.
Chrome extension details include site-access choices such as On select, On specific sites and On all sites for eligible extensions. Source
A permission audit is not a lookup audit. It does not tell you what the wider internet knows about you, and it does not expose private records. If you want the broader footprint picture, the companion guide on how to audit what the internet knows about you in 30 minutes covers that separate task.
Step 1: List the extensions you installed
Open Chrome’s extensions page and work from the list of installed extensions. The goal is a complete inventory before you change anything, because an extension you forget is an extension you never review.
- Note each extension’s name and what you believe it does.
- Separate extensions you deliberately installed from anything you do not recognize.
- Mark the ones you use daily, the ones you use occasionally, and the ones you cannot explain.
- Do not change settings yet. Inventory first, decisions second.
A useful discipline: if you cannot say in one sentence which site the extension serves, it is a candidate for the narrowest setting available or for removal.
Step 2: Decide what each extension needs
The decision is not “is this extension good?” but “on which sites does this extension need to run?” Use the table below as a working decision aid. It describes the choice, not a guarantee about any particular extension.
| Extension type | Typical need | Sensible site-access choice | Watch for |
|---|---|---|---|
| Site-specific helper (one store, one dashboard, one tool) | Runs on one or a few sites | On specific sites, listing only those sites | Adding a site “just in case” |
| Reading or clipping tool | Runs where you read | On specific sites or On select | Broad access you never revisit |
| Password or form helper | Often needs broad access to work | On all sites only if you accept the trade-off | Assuming narrow access keeps every feature |
| Developer or debugging helper | Runs on project or test sites | On specific sites | Leaving it on production sites |
| Extension you cannot explain | No clear need | Remove it, or restrict it until you decide | Treating an unfamiliar name as harmless |
Two honest limits apply. First, not every extension exposes the same choices, and some features may depend on broader access. Second, the setting you choose is a site-access choice; it is not a statement about everything the extension can do.
Step 3: Set site access deliberately
For each extension that offers site-access choices, choose the narrowest option that still lets you do the job. The three common choices are On select, On specific sites and On all sites. “On select” generally means the extension asks or activates when you invoke it; “On specific sites” means you maintain a list; “On all sites” means it can run broadly.
A practical sequence:
- Start with the extension you understand best, so you learn the interface before touching the risky ones.
- Choose On specific sites and add only the sites where you have actually used the extension.
- Test the extension on one listed site and one unlisted site, and note what changes.
- If a feature breaks on an unlisted site, decide whether you need that feature there before widening access.
- Record what you changed and why, so the next audit is faster.
Do not treat a narrower setting as a substitute for removing an extension you do not need. The cleanest permission is the one attached to an extension that is no longer installed.
Step 4: Review exceptions and edge cases
Exceptions are where permission audits quietly fail. An extension set to On specific sites can accumulate a long list over months, and each entry is a place where the extension can run.
- Review the site list for entries you no longer visit.
- Remove sites you added during a one-off task.
- Check whether a site you trust has broad subdomains or shared hosting that changes what “that site” means in practice.
- Re-test after removing entries, because a feature you rely on may have been served by an entry you just deleted.
One important limit: changing an extension’s website-access permissions does not change its lower-level network access through VPN or proxy settings. If your concern is network-level traffic rather than page access, a site-permission review is the wrong tool, and you should examine those settings separately.
Changing an extension’s website-access permissions does not change its lower-level network access through VPN or proxy settings. Source
Common mistakes
Treating site access as a full security review. A site-permission setting controls where an eligible extension can run. It does not audit the extension’s code, its developer, or its network behaviour.
Widening access to fix one broken feature. If a feature fails on an unlisted site, the disciplined move is to ask whether you need that feature on that site, not to switch to On all sites by reflex.
Confusing extension permissions with logged-in sessions. Signing out of a site or clearing cookies is a session decision. It is not the same as changing an extension’s site access, and neither one substitutes for the other.
Auditing only the extensions you remember. The inventory step exists because forgotten extensions are the ones that keep broad access for years.
Assuming an edited profile means something was deleted. If you are thinking about accounts rather than extensions, remember that an edited or empty profile does not establish deletion of stored data. That is a separate question from this audit.
Skipping the re-test. After narrowing access, confirm the features you actually use still work. A permission change you have not tested is a guess.
Protecting your own footprint
Extension permissions are one layer of a larger picture. Limiting site access reduces where an eligible extension can run, but it does not tell you what public information about you is already visible elsewhere.
That is where a separate check helps. TraceSeek, the app covered by TruthsSeek, checks a username across 3,000+ platforms, and the first scan is free. A scan takes 20-30 seconds according to the product’s fact sheet. Public username matches are leads, not proof of ownership, and a username search is not a complete account inventory; it does not automatically find renamed accounts, search username variants for you, or classify accounts as active or dormant.
Used honestly, a username check complements a permission audit: the extension audit controls what runs in your browser, while a username check shows where a public handle appears. Neither one changes platform settings, and neither one exposes private records.
A simple order of work:
- Inventory installed extensions and decide site access for each.
- Review and prune exception lists.
- Re-test the features you rely on.
- Check your public handles separately, treating matches as leads to review.
- Repeat the extension audit when you install something new, not only when something feels wrong.
Key facts
Chrome extension details include site-access choices such as On select, On specific sites and On all sites for eligible extensions.
Changing an extension’s website-access permissions does not change its lower-level network access through VPN or proxy settings.
TraceSeek checks a username across 3,000+ platforms, and the first scan is free.
A TraceSeek scan takes 20-30 seconds according to the product’s fact sheet, and public username matches are leads rather than proof of ownership.