Free tool
Chrome and Firefox data disclosure helper
Tick what your browser extension collects. The answers for the Chrome Web Store’s Privacy practices tab and Firefox’s manifest appear as you go. Nothing you choose leaves your browser.
This is not legal advice. Use it at your own risk. Store forms and policies change, so check each answer against the current form before you submit.
This is not legal advice. Use it at your own risk. Store forms and policies change, so check each answer against the current form before you submit.
Chrome: tick nothing. Firefox: required none.
Chrome Web Store
Data usage: tick these
None
Certifications
- I do not sell or transfer user data to third parties, outside of the approved use cases. True if no one buys or receives the data except services working for you, such as an analytics or hosting provider, which the approved use cases allow.
- I do not use or transfer user data for purposes that are unrelated to my item's single purpose. True if you use the data only for what the extension is for, and to keep it working.
- I do not use or transfer user data to determine creditworthiness or for lending purposes. True unless the data feeds a credit or lending decision.
Remote code
No, I am not using remote code.
Privacy policy
Not required, but a short one saying the extension collects nothing helps reviewers.
Firefox
Add this to manifest.json:
{
"browser_specific_settings": {
"gecko": {
"strict_min_version": "140.0",
"data_collection_permissions": {
"required": [
"none"
]
}
}
}
}- Needs Firefox 140 or later on desktop, and 142 on Android.
- Optional permissions appear as toggles when someone installs. Firefox does not enforce them: your extension has to check
browser.permissionsand honour the answer. - addons.mozilla.org needs a privacy policy whenever the add-on sends data anywhere.
Privacy-policy draft: a starting point, not legal advice
[Extension name] privacy policy (draft)
[Extension name] collects no data, and sends nothing anywhere.
Contact: [your contact address].Share this result
The link carries your choices after the #, which browsers never send to a server.
How each kind maps to each store
| Kind | Chrome Web Store box | Firefox permission |
|---|---|---|
| Name, email address, account or ID numbers | Personally identifiable information | personallyIdentifyingInfo |
| Health data | Health information | healthInfo |
| Payment or financial details | Financial and payment information | financialAndPaymentInfo |
| Passwords, usernames, PINs or login tokens | Authentication information | authenticationInfo |
| Emails, messages or posts people write | Personal communications | personalCommunications |
| Location | Location | locationInfo |
| Which sites or pages people visit | Web history | browsingActivity |
| Clicks, scrolling or typing on websites | User activity | websiteActivity |
| What is on the web pages people visit | Website content | websiteContent |
| Search terms | Web history | searchTerms |
| Bookmarks | Web history | bookmarksInfo |
| How people use the extension itself | User activity | technicalAndInteraction (optional only) |
Checked against the stores’ documentation on October 2, 2026: Chrome Web Store: fill out the privacy fields; Chrome Web Store: user data FAQ; Firefox: built-in consent for data collection and transmission.