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Subify is a web extension for Google Chrome¹ that enables users to create unique subaddresses for each website they visit (done by using the adler-32² checksum of the host of the active tab).

This empowers users to more effectively manage their inbox and protect their privacy. Useful when providing an email address to a website that may be suspicious or known for sending unwanted mail. Using subaddresses in this way makes it easy to determine the source of emails and create filters to block specific emails without unsubscribing (which often relies on 3rd-party services that likely provide a non-intuitive interface).

Built with ♥️ and TypeScript :)

Contributing

Contributing is welcome, just be sure to fork the package repository and submit a pull request on your changes.

Dependencies

The extension requires a few dependencies for the UI and functionality.

• @mui/material - Used as the framework for visual components such as the popup, allowing for rapid development of UI. (@emotion/react, @emotion/styled, and @mui/icons-material are also included)
• adler-32 - Provides the hashing function used in the subaddress
• lodash - While not strictly necessary, this library provides a number of useful functions for manipulating strings and objects
• react - Serves as the framework for the extension's UI (react-dom is also included)
• zod - Provides types, schema, and validation throughout the extension

Permissions

The extension requests only minimal necessary permissions in order to respect privacy and adhere to the Chrome Web Store's updated privacy policy.

• activeTab - Allows the extension to retrieve the URL of the currently active tab
• storage - Allows the extension to store the user-provided email address(es)

Footnotes

1. Currently only available on the Chrome Web Store, but may be made available on the Firefox Add-ons Store in the future. ↩

2. Adler-32 was chosen as the checksum function because of it's speed, collision-resistance, and length (8 characters). ↩