Bugzilla

Network requests from content scripts that are same-site (NOTE: same-site, not necessarily same-origin!) relative to the document's URL SHOULD still include samesite=lax cookies. This does apparently NOT happen.

STR:

1. Load the attached extension.
   (the extension will create a session cookie with SameSite=Lax at `httpbin.org`)
2. Click on the extension button to open https://httpbin.com/dummy
3. Look at the page (modified by the extension).

Expected:
```
fetch to 'http://httpbin.org/cookies' received the following cookies: { "testcookie": "test from ..." }
This is a same-origin request, SameSite cookies should be included.
```

Actual:
```
fetch to 'http://httpbin.org/cookies' received the following cookies: {}
This is a same-origin request, SameSite cookies should be included.
```

Note: The expected behavior occurs if you open the DevTools console for the page from step 3 and run `runTest()`
Note: The actual behavior (of not including cookies) is expected when you visit a third-party site such as example.com.

Network requests from content scripts that are same-site (NOTE: same-site, not necessarily same-origin!) relative to the document's URL SHOULD still include samesite=lax cookies. This does apparently NOT happen.

STR:

1. Load the attached extension.
   (the extension will create a session cookie with SameSite=Lax at `httpbin.org`)
2. Open https://httpbin.org/dummy
3. Look at the page (modified by the extension).

Expected:
```
fetch to 'http://httpbin.org/cookies' received the following cookies: { "testcookie": "test from ..." }
This is a same-origin request, SameSite cookies should be included.
```

Actual:
```
fetch to 'http://httpbin.org/cookies' received the following cookies: {}
This is a same-origin request, SameSite cookies should be included.
```

Note: The expected behavior occurs if you open the DevTools console for the page from step 3 and run `runTest()`
Note: The actual behavior (of not including cookies) is expected when you visit a third-party site such as example.com.