updated docs and added AGENT.md
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# Firefox Proxy Switcher
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A Firefox extension that allows selective application of proxy servers to specific domains, providing flexible proxy management for different websites.
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Proxy Switcher is a Firefox WebExtension that routes requests for selected domains through HTTP or SOCKS5 proxies. Settings and proxy credentials stay in Firefox local extension storage.
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## Features
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- **Domain-specific proxy configuration**: Apply different proxy settings to different domains
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- **Proxy profiles**: Save and reuse proxy configurations
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- **HTTP and SOCKS5 support**: Support for both HTTP and SOCKS5 proxy types
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- **Authentication support**: Username/password authentication for proxies
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- **Tag-based organization**: Organize domains with custom tags
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- **Quick toggle**: Enable/disable proxy for domains with one click
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- Configure a different proxy for each domain.
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- Use HTTP or SOCKS5 proxies.
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- Store optional proxy username and password per domain.
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- Save reusable proxy profiles.
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- Enable or disable a configured domain from the popup.
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- Search domains and filter them by tags.
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- Choose a **System**, **Light**, or **Dark** theme in Advanced Settings.
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- Use the same theme in the options page and popup.
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- Run on Firefox desktop and Firefox Android versions that support the declared minimum version.
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## Security and Privacy
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## How it works
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This extension is designed with user privacy and security in mind:
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The background script listens to `browser.proxy.onRequest`. It extracts the request's origin domain and returns the matching proxy configuration. Domains without a configuration, and configured domains whose `enabled` value is `false`, use a direct connection. Proxy authentication is supplied only when the matching domain has credentials.
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### Data Storage
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- All configuration data (domains, profiles, proxy settings) is stored locally in the browser using Firefox's `browser.storage.local` API
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- Proxy credentials (usernames/passwords) are encrypted and stored only in the local browser storage
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- No data is transmitted to external servers or collected by the extension
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The extension does not collect browsing history or send configuration to a server. Domain entries, profiles, theme selection, and credentials are saved with `browser.storage.local`. The extension does not implement an additional encryption layer, so protect the Firefox profile and device that contain the data.
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### Network Permissions
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The extension requests the following permissions necessary for its functionality:
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## Use the popup
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- `proxy`: Required to configure and manage proxy settings
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- `storage`: Required to save user configuration locally
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- `tabs`: Required to determine the current domain when configuring proxy settings
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- `activeTab`: Required to access the current tab for configuration
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- `webRequest`: Required to handle proxy authentication requests
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- `webRequestBlocking`: Required to intercept and modify network requests for proxy routing
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- `<all_urls>`: Required to apply proxy settings to any website the user visits
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1. Open a website and click the Proxy Switcher toolbar button.
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2. If the domain already has a configuration, use **Use proxy for this domain** to enable or disable it.
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3. For a new domain, enable the switch, enter the proxy host and port, then select **Apply & Reload**.
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4. Open **Advanced Settings** for the complete domain and profile manager.
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### How Proxy Routing Works
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1. When a user visits a website, the extension checks if that domain has proxy configuration
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2. If configured, the extension routes the traffic through the specified proxy server
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3. If not configured, traffic uses the direct connection (no proxy)
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4. Authentication credentials are only used when required by the proxy server and are transmitted securely
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## Advanced Settings
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### Security Considerations
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- **No data collection**: The extension does not collect, store, or transmit any browsing data
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- **Local-only storage**: All settings remain on the user's device
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- **Transparent operation**: Users can see exactly which domains use which proxies
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- **No external dependencies**: The extension works entirely offline once configured
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The options page provides:
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- Proxy profiles that can be reused while editing domains.
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- Domain entries with proxy type, host, port, optional credentials, tags, and enabled state.
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- Search and tag filtering.
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- Bulk deletion of domains, profiles, or all extension data.
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- Theme selection: **System**, **Light**, or **Dark**.
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## Permissions
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The manifest requests these permissions:
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- `proxy` — route requests through the selected proxy.
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- `storage` — store domains, profiles, theme, and credentials locally.
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- `tabs` and `activeTab` — identify the active tab's domain and reload it after changes.
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- `webRequest` and `webRequestBlocking` — provide proxy authentication credentials.
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- `<all_urls>` — apply the domain routing policy to web requests.
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These permissions are used for proxy management. The manifest declares `data_collection_permissions.required` as `none`.
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## Installation
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1. Download the extension package
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2. Open Firefox and navigate to `about:addons`
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3. Click the gear icon and select "Install Add-on From File"
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4. Select the downloaded extension file
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5. The extension will be installed and ready to use
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### Firefox desktop
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For Firefox Android, install the signed XPI from the extension's AMO page or use
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Firefox's self-distributed add-on installation flow. The manifest declares Android
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compatibility through `browser_specific_settings.gecko_android`; unsigned local
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packages are still rejected by Firefox's extension signing policy.
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For a temporary development install:
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### Advanced Settings
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1. Open `about:debugging#/runtime/this-firefox`.
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2. Select **Load Temporary Add-on**.
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3. Choose `manifest.json` or a freshly built XPI.
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Open **Advanced Settings** from the extension popup to manage all domains and
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profiles. The **Theme** selector supports **System**, **Light**, and **Dark** and
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is stored locally for use in both the options page and popup.
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For a normal install, use an XPI signed by Mozilla/AMO. Firefox may reject an unsigned or stale-signed package.
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## Usage
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### Firefox Android
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### Basic Setup
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1. Click the Proxy Switcher icon in the Firefox toolbar
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2. Configure proxy settings for the current domain or access full settings
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Firefox Android requires a signed extension package. Submit the build through [addons.mozilla.org/developers](https://addons.mozilla.org/developers/) and download the signed XPI after review, or follow Mozilla's [self-distributed extension instructions](https://extensionworkshop.com/documentation/publish/install-self-distributed/). The manifest includes `browser_specific_settings.gecko_android` so AMO can mark the extension as Android-compatible.
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### Advanced Configuration
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1. Right-click the extension icon and select "Options"
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2. Add proxy profiles for reuse across domains
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3. Configure domain-specific proxy settings
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4. Use tags to organize your proxy configurations
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The `proxy.onRequest` API is supported on Firefox Android, but the extension still needs to be tested on the target Firefox version and device.
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## Permissions Explanation
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## Build
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### Required Permissions
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- **proxy**: Allows the extension to configure Firefox's proxy settings
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- **storage**: Enables saving your proxy configurations locally
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- **tabs**: Lets the extension know which domain you're currently viewing
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- **activeTab**: Provides access to the currently active tab for configuration
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- **webRequest**: Handles authentication with proxy servers
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- **webRequestBlocking**: Intercepts and routes network requests through proxies
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- **<all_urls>**: Applies proxy settings to any website you visit
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Install `web-ext`, then run:
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All permissions are used solely for proxy management and do not enable data collection or tracking.
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```sh
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make build
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```
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## Support
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The package is created at `web-ext-artifacts/proxyswitcherforkbywt.xpi`. This local build is not an AMO signature. After changing any file, rebuild and sign again; do not reuse old `META-INF` signature files.
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If you encounter issues or have questions:
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1. Check that all required permissions are granted
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2. Verify your proxy server settings are correct
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3. Ensure the proxy server is accessible from your network
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To remove generated packages:
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## Version
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```sh
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make clean
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```
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Current version: 1.0.1
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## Validation
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```sh
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node --check background.js
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node --check config-manager.js
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node --check popup.js
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node --check options.js
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python -m json.tool manifest.json >/dev/null
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```
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## Project version
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Current version: **1.0.1**
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