Privacy, support, and release information for Window Resize Manager.
View the Project on GitHub Gevorg-Glechyan/window-size-extension
Effective date: 2026-06-28
Window Resize Manager is a local-first Chrome extension for reading current Chrome window and viewport dimensions, then resizing the current normal Chrome browser window from a toolbar popup using built-in presets, locally saved custom presets, or manually entered dimensions.
Window Resize Manager exists to help users inspect and resize the current Chrome browser window. It does not provide accounts, cloud synchronization, advertising, team workspaces, billing, content inspection, or background website monitoring.
Window Resize Manager does not collect, sell, share, transfer, or remotely store user-created presets, recent custom dimensions, selected resize mode, viewport measurements, window dimensions, or inspected-page data. Those values stay local to the user’s browser.
The extension does not use advertising, accounts, cloud synchronization, crash reporting, session replay, surveys, heatmaps, or autocapture.
Both Chrome build variants send explicit, cookieless usage analytics to PostHog
EU Cloud at https://eu.i.posthog.com. These events measure popup opens,
resize requests and outcomes, custom preset actions, and resize target setting
changes. Analytics properties are limited to enum values, booleans, and
low-cardinality buckets such as build variant, preset count, dimension size,
duration, result, and bounded failure category.
There is no user-facing analytics setting in either build.
Analytics events do not include page content, selected text, full page URLs,
tab titles, cookies, website localStorage, form data, browsing history,
account data, preset names, exact custom dimensions, raw error messages, stable
personal identifiers, authentication data, financial data, health data, personal
communications, or location data.
The extension stores only user-created window presets, up to three latest custom dimensions, and the selected resize target mode in Chrome extension storage on the user’s device. This data is used only to show saved presets, refill recent custom dimensions, and apply the user’s selected resize behavior in the toolbar popup.
Uninstalling the extension removes its Chrome extension storage according to Chrome’s normal extension data behavior.
Window Resize Manager does not read page content, selected text, full page URLs, cookies, website localStorage, form data, browsing history, authentication data, financial data, health data, personal communications, or location data.
When a user opens the popup or applies viewport size mode, the extension may use
Chrome’s activeTab and scripting permissions for a one-shot measurement of
numeric viewport dimensions on the active tab. The measurement is used locally
to show the current viewport size or calculate the outer Chrome window size
needed for the requested viewport. These measurements are not stored or sent
anywhere.
The extension requests only the permissions needed for implemented behavior:
windows: read and resize the current normal Chrome browser window.storage: save custom presets, recent custom dimensions, and the selected
resize target mode locally.activeTab: allow user-triggered active-tab viewport measurement.scripting: run the one-shot numeric viewport measurement probe when allowed
by Chrome.The extension does not request host permissions, optional host permissions, manifest-declared content scripts, DevTools APIs, or broad tab access. Both build variants’ only remote destination is the documented PostHog usage analytics endpoint.
The extension does not load or execute remotely hosted extension code. The toolbar popup, background service worker, React bundle, dependencies, fonts, and icons are packaged inside the extension.
Window Resize Manager is not directed to children and does not knowingly collect personal information from children.
Window Resize Manager limits stored data to Chrome extension storage and limits remote transmission to the explicit cookieless analytics events described in this policy. No method of storage or transmission can be guaranteed perfectly secure, but the extension is designed to avoid collecting sensitive page, account, or browsing data.
Privacy-impacting changes, including new permissions, network destinations, analytics, content scripts, host access, or page-data access, must be documented in this policy before release.
For privacy questions or bug reports, open a GitHub issue:
https://github.com/Gevorg-Glechyan/window-size-extension/issues