Missing originUrl in Browser.webRequest.WebRequestHeadersDetails

Describe the bug

The following code worked perfectly in versions 0.19.x:

export default defineBackground(() => {
  browser.webRequest.onBeforeSendHeaders.addListener(
    details => {
      console.log(details.originUrl);
    }, {
      urls: ["<all_urls>"],
    }
  );
});

In versions 0.20.x, it fails to build, because the originUrl field was omitted in the new WebRequest types.

This field exists only in Firefox according to MDN

Reproduction

wxt-no-originurl.zip

Steps to reproduce

Run npm install followed by npm run build or npm run build:firefox.

Expected Results: successful build

Actual Result: failed build

System Info

System:
    OS: macOS 15.4.1
    CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
    Memory: 117.80 MB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 22.14.0 - ~/.nvm/versions/node/v22.14.0/bin/node
    npm: 10.9.2 - ~/.nvm/versions/node/v22.14.0/bin/npm
  Browsers:
    Chrome: 135.0.7049.115
    Safari: 18.4

Used Package Manager

npm

Validations

• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

Start with the provided wxt-no-originurl.zip reproduction and inspect the TypeScript definition for Browser.webRequest.WebRequestHeadersDetails. Run npm install followed by npm run build or npm run build:firefox; done means the reproduction builds successfully with originUrl available in the Firefox webRequest details type.