Cookie Setter — GinjaNinja

Cookie Setter automatically injects cookies into websites whenever you visit them, ensuring your preferences are always restored, even after clearing your browsing history or cookies.

Perfect for:

🌙 Restoring dark mode preferences on sites that store your theme choice in a cookie
🔒 Persisting login preferences or consent banners you've already dealt with
⚙ Maintaining site settings that would otherwise reset when you clear your history


How it works:
Simply add a cookie rule by entering the domain, cookie name, and value. Cookie Setter runs silently in the background and automatically sets your defined cookies every time you visit a matching website, no manual effort required.

Features:
✅ Set cookies for any domain and its subdomains
✅ Control cookie path, expiration, SameSite policy, and HttpOnly flag
✅ Enable or disable individual rules without deleting them
✅ Supports session cookies or custom expiration by days or date
✅ Skips setting a cookie if it already exists — no unnecessary overwrites
✅ Clean, simple interface to manage all your cookie rules in one place

Your data stays yours. All cookie rules are stored locally on your device using Firefox's built-in storage.

Tip: Visit a site, use your browser's developer tools (F12 → Storage → Cookies) to find the exact cookie name and value used for dark mode, then add it as a rule in Cookie Setter. You'll never have to set it again!