Site Restrictor

Site Restrictor is a clean, no-nonsense focus tool. Create as many block lists as you want, and for each one choose how strict the block should be — a permanent "site is restricted" page, a password prompt, or a schedule that only blocks during the hours you set. Per-rule keyword whitelists let you keep specific paths reachable (e.g. block facebook.com generally but keep /messages working). Everything runs locally in your browser. No accounts, no servers, no telemetry, no ads — your block lists never leave your machine. ✦ KEY FEATURES • Unlimited block lists — group sites by intent (Work focus, Evening wind- down, Doomscroll detox, etc.) and toggle each list on/off in one click. • Three block modes per list: – Permanent — shows a friendly "Site is restricted" page. – Password-protected — prompts for a password before allowing access. – Time-restricted — blocks only during the days and time ranges you pick (supports overnight windows like 22:00 → 06:00). • Three match types per list — Domain (host + subdomains), URL substring, or full Regular Expression. • Per-rule whitelist keywords — bypass the block when the URL contains any listed keyword. Great for "block X, except for the parts I actually need." • Flexible password unlock — when you enter the correct password, you can choose how long it stays unlocked: – Until the browser is closed (current session). – Until the tab is closed. – For a set time (configurable minutes). • Custom block message per list — explain to yourself why this site is off-limits. • Polished UI with light + dark theme that follows your system setting. • Built on Manifest V3, the modern, secure Chrome extension platform. ✦ PRIVACY Site Restrictor stores everything in your browser's local extension storage. It does not: • …send your browsing data anywhere. • …include trackers or analytics of any kind. • …make outbound network requests. • …read page contents (no content script injection). Passwords are hashed with PBKDF2-SHA256 (150,000 iterations) using a unique per-rule salt and the browser's built-in Web Crypto API. The plaintext password is never stored. ✦ WHY THE REQUESTED PERMISSIONS? • Storage — to save your block lists and unlock sessions on your machine. • webNavigation — to detect when you navigate to a URL and decide whether the rule applies. • Tabs — to redirect the current tab to the "Site is restricted" or password prompt page when a rule matches. • Host access (all sites) — your block lists can match any URL, so the extension needs to inspect the URL on every navigation. It does not read page contents; only the URL is checked, on-device. ✦ TIPS • Click the toolbar icon to see whether the current tab is being blocked and by which list, or to quickly start a new block list for the current site. • Combine match types: keep one regex rule for catch-alls and a domain rule for everyday sites. • Use whitelist keywords sparingly — they make the rule looser. If a URL contains the keyword, the rule does not fire. Built for people who want their browser to help them focus, not nag them. No accounts. No subscription. No data harvesting. Open it, set your rules, and get on with your day.