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Browser

Requirements​

Before you start, you must complete the Clients repository setup instructions.

Build Instructions​

  1. Build and run the extension:

    cd apps/browser
    npm run build:watch
    note

    The build commands use Manifest v3 by default. If you are building for a non-Chrome browser like Firefox or Safari, you should use the command npm run build:watch:<browser client name> instead.

  2. Load the unpacked browser extension in your browser using the instructions in the next section.

Environment Setup​

By default, the browser extension will run pointing to the production server endpoints. To override this for local development and testing, there are several options.

Using managedEnvironment​

The browser extension has the concept of a "managed environment", which is JSON configuration stored in development.json, within the devFlags object.

The managedEnvironment setting allows the contributor to override any or all of the URLs for the server. The managedEnvironment is read in the BrowserEnvironmentService and overrides the default (production) settings for any supplied URLs.

There are two ways to use managedEnvironment, depending upon whether you will also be running the web vault at the same time.

managedEnvironment with web vault running​

If you are also running the web vault, you only need to set the base URL in the managedEnvironment:

{
   "devFlags":{
      "managedEnvironment":{
         "base":"https://localhost:8080"
      }
      ...
   }
   ...
}

This is because the web vault includes the webpack-dev-server package in its webpack.config.js. When it is running, it proxies each of the endpoints based on the settings configured in its own development.json configuration file:

  "dev": {
    "proxyApi": "http://localhost:4000",
    "proxyIdentity": "http://localhost:33656",
    "proxyEvents": "http://localhost:46273",
    "proxyNotifications": "http://localhost:61840"
  },

This means that when the web vault is running, the browser managedEnvironment does not need to override each of the URLs individually. The browser will format each URL as {base}/{endpoint}, such as http://localhost:8080/api, but the webpack DevServer will proxy that URL to the correct port, like http://localhost:4000.

managedEnvironment without web vault running​

If you are testing the browser extension without the web vault running, you will not be able to take advantage of the webpack DevServer to proxy the URLs. This means that your managedEnvironment setting must explicitly override all of the URLs with which you are going to be communicating locally.

{
    "devFlags": {
        "managedEnvironment": {
            "webVault": "http://localhost:8080",
            "api": "http://localhost:4000",
            "identity": "http://localhost:33656",
            "notifications": "http://localhost:61840",
            "icons": "http://localhost:50024"
        }
        ...
    }
    ...
}

Manually setting the Custom Environment URLs​

You may want to adjust the server URLs to point to your local server once you have loaded the extension instead of overriding them in managedEnvironment. You can change this through the browser settings. You can see instructions on how to configure the URLs here.

Once configured, your local Custom Environment should look like this:

Screenshot of Custom Environments

Testing and Debugging​

Chrome and Chromium-based browsers​

To load the browser extension build:

  1. Navigate to chrome://extensions in your address bar. This will open the extensions page
  2. Enable “developer mode” (toggle switch)
  3. Click the “Load unpacked” button
  4. Open the build folder of your local repository and confirm your choice

You will now have your local build of the browser extension installed.

You can debug the background page of the browser extension by clicking “background.html” underneath the Bitwarden heading in chrome://extensions. You can debug the popup by right-clicking it while it is open and clicking “Inspect”.

Firefox​

To load the browser extension build:

  1. Navigate to about:debugging in your address bar. This will open the add-on debugging page
  2. Click “This Firefox”
  3. Click “Load Temporary Add-on”
  4. Open the build folder of your local repository and open the manifest.json file

You will now have your local build of the browser extension installed.

The temporary add-on will only be installed for the current session. If you close and re-open Firefox, you will have to load the temporary add-on again.

You can debug the background page of the browser extension by clicking the “Inspect” button next to the Bitwarden heading in the Temporary Extensions page. To debug the popup:

  1. Inspect the background page using the instructions above

  2. Click the “three dots” in the top right-hand corner of the debugger and click “Disable Pop-up Auto-hide”

    Screenshot of the context menu

  3. Open the extension popup

  4. Click the “iframe” button (next to the “three dots”) and select “/popup/index.html”

Safari​

Safari WebExtensions must be distributed through the Mac App Store, bundled with a regular Mac App Store application. Due to this the build and debug process is slightly different compared to the other browsers.

Uninstall previous versions​

If you’ve built, installed or ran the Desktop client before (including the official release), Safari will most likely continue to load the official Browser extension and not the version you’ve built from source.

To avoid this, follow the instructions below to uninstall the Safari extension:

  1. Open Safari
  2. Click “Settings” and then click the “Extensions” tab
  3. Click uninstall next to the Bitwarden extension
  4. Delete the Application with the extension.
  5. Reopen Safari and check Settings to confirm that there is no Bitwarden Browser extension installed. In case there still is a Bitwarden Extension please repeat step 3-4.
  6. Quit and completely close Safari

You may need to do this periodically if you are loading the Browser extension from different sources (for example, switching between a local build and the official release).

Developing in Xcode​

The easiest way to develop the extension is to build and debug it using Xcode.

  1. Build the extension:

    npm run build:watch:safari

  2. Open src/safari/desktop.xcodeproj in Xcode

  3. Run the "desktop" target.

note

Please remember to re-run through Xcode whenever any changes are made to the source files. It will not automatically reload.

Production build​

The other alternative is to use the "proper" build process through gulp. This method doesn't require any manual processing of the output since gulp does it for us. However we have to completely rebuild the extension for every change, which is slower.

  1. Build the extension for Safari

    npm run dist:safari:dmg

  2. Open Safari and check Settings to confirm that the extension is installed and enabled

caution

You may need to Configure Safari in macOS to Run Unsigned Extensions.

To enable debugging:

  1. Click “Settings” and then click the “Advanced” tab
  2. Enable “Show Develop menu in menu bar”

You can debug the background page of the browser extension by clicking Develop -> Web Extension Background Pages and then selecting Bitwarden. You can debug the popup by right-clicking it while it is open and clicking "Inspect Element".

This should be enough for most debugging and testing, unless you're working in native code.