Mail HTML Injector — Source-Available License
Copyright (c) 2026 Alberto Riesco. All rights reserved.

1. DEFINITIONS
   "Software" means the source code, assets, and documentation contained in
   this repository, EXCLUDING the third-party components listed in Section 6.
   "You" means any individual or entity exercising the permissions below.

2. GRANT (what you MAY do)
   Subject to the terms below, the author grants you a worldwide, royalty-free,
   non-exclusive, non-transferable, revocable license to:
     (a) view and download the Software; and
     (b) install and use the Software for your own PERSONAL, non-commercial
         purposes, including running it as an unpacked browser extension.

3. RESTRICTIONS (what you may NOT do)
   Except with the author's prior written permission, you may NOT:
     (a) redistribute, republish, mirror, sublicense, sell, rent, or otherwise
         make the Software (modified or unmodified, in whole or in part)
         available to any third party;
     (b) publish the Software, or any derivative of it, to any extension store,
         marketplace, package registry, or website;
     (c) remove, alter, or obscure this license, the copyright notices, or the
         attribution of third-party components;
     (d) use the Software, or any part of it, in a commercial product or
         service.
   Viewing and personal use are permitted; copying for redistribution is not.

4. NO CONTRIBUTION OF RIGHTS
   Making the Software publicly viewable does not grant any rights beyond those
   expressly stated here. All rights not expressly granted are reserved.

5. NO WARRANTY
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER LIABILITY, WHETHER IN AN
   ACTION OF CONTRACT, TORT, OR OTHERWISE, ARISING FROM, OUT OF, OR IN
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

6. THIRD-PARTY COMPONENTS
   This project bundles DOMPurify (lib/purify.min.js), Copyright (c) Cure53 and
   other contributors, dual-licensed under the Apache License 2.0 and the
   Mozilla Public License 2.0. DOMPurify remains governed by its own license
   (see the header of lib/purify.min.js); nothing in this license restricts
   your rights to DOMPurify under those terms.

For redistribution rights, commercial use, or any other permission, contact the
author.