1402289 - Requests to relative URL from content script do not work as in chrome

Status: RESOLVED WONTFIX

(WebExtensions :: Compatibility, defect)

Description

[geku94]

User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.91 Safari/537.36

Steps to reproduce:

Sent a request:

fetch('/ajax.php', { method: 'get', credentials: 'include' })
    .then((res) => res.text())
    .then((resp) => {
        console.log(resp)
    });

Same result with jQuery.ajax() equivalent.


Actual results:

Nothing happens on page where content script is injected (no errors in console and nothing on network tab). There is an error on background page: TypeError: /ajax.php is not a valid URL.

Changing '/ajax.php' to 'https://example.com/ajax.php' works.


Expected results:

Text should appear in console. That is how it works in Chrome.

Also in Chrome all requests sent from content script appears on network tab of a page where content script is injected. In Firefox they appear on network tab of a background page. Not sure if this is intended. And this may be the cause of a bug (requests being sent from background page instead of a page where content script is injected).

As a workaround changing all 'ajax.php' to location.origin + '/ajax.php' works.

Comment 1

[Kris Maglione [:kmag]]

Content script requests happen in the context of your extension, not of the content page. This is intentional.

Comment 2

[geku94]

Thanks for clarifying. Should it be listed here https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Chrome_incompatibilities ?

Comment 3

[Kris Maglione [:kmag]]

Perhaps

Comment 4

[Will Bamberg [:wbamberg]]

> Should it be listed here https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Chrome_incompatibilities ?

Looks like you added this already, geku94. Thanks!