undefined
Extension: PZ Devtools (Project Zero Devtools)
Publisher: Akinon
Last updated: 2026-04-29
PZ Devtools is a developer tool for inspecting page data and measuring web performance during local development and debugging. This policy
explains what the extension does and does not do with your data.
1. Data the extension accesses
To provide its features, the extension reads the following data from the tab the developer is actively inspecting:
- URL parameters of the active tab (for the JSON viewer).
- localStorage and sessionStorage of the active tab (for the JSON viewer).
- Cookies of the active tab's domain (for the JSON viewer).
- Performance metrics — Core Web Vitals (LCP, INP, CLS, FCP, TTFB), navigation and resource timing, and request durations.
- User preferences — debug toggles, performance budgets, last active tab, and similar UI state.
2. How data is used
- Data is processed only on the user's local device, inside the browser, for the sole purpose of displaying it back to the developer in the
popup or DevTools panel.
- Performance metrics and preferences are stored using chrome.storage.local and chrome.storage.sync on the user's machine and Chrome profile.
- The "Clear Cache" action calls chrome.browsingData.remove and only runs when the user clicks it.
3. Data the extension does NOT collect or share
- The extension does not transmit any data to remote servers. There is no analytics, no telemetry, and no backend.
- The extension does not sell or share user data with third parties.
- The extension does not use the data for advertising, profiling, or creditworthiness determination.
- The extension does not modify cookies, storage, or page content.
4. Permissions
The extension requests Chrome permissions (tabs, activeTab, scripting, webRequest, webNavigation, storage, cookies, browsingData, alarms, and
host access to <all_urls>) solely to implement the features described above. Permissions are not used for any other purpose.
5. Remote code
All application code (Chart.js, JSONEditor, web-vitals, lodash) is bundled inside the extension package. The extension does not load or execute
any remote JavaScript.
6. Data retention
Locally stored performance data and preferences remain on the user's device until the user clears them, uninstalls the extension, or until the
extension's periodic cleanup task removes stale entries. No copies exist anywhere else.
7. Children's privacy
The extension is intended for software developers and is not directed at children under 13.
8. Changes to this policy
If this policy changes, the updated version will be published at the same URL with a new "Last updated" date.
9. Contact
For privacy questions about this extension, contact: mustafa.emir@akinon.com