Open Bug 634073 Opened 12 years ago Updated 4 months ago
"http-on-modify-request" is not fired for cached images
STR: You need to enable: browser.dom.window.dump.enabled true 1) Install the attached extension 2) Load http://getfirebug.com/tests/issues/3742/issue3742.html 3) Do a non-revalidating reload (press ENTER in address bar) 4) See the system console, it's displaying: --- observe: http://localhost/firebug/tests/issues/3742/issue3742.html "http-on-modify-request" are not fired for images. If you refresh the page by pressing F5 you'll see: --- observe: http://localhost/firebug/tests/issues/3742/issue3742.html --- observe: http://localhost/firebug/tests/issues/3742/image1.png --- observe: http://localhost/firebug/tests/issues/3742/image2.png Source code of the attached extension is available here: http://code.google.com/p/fbug/source/browse/#svn%2Ftests%2Fmozilla%2FnetObserver Honza
Confirming this issue, For my add-on update at AMO (https://addons.mozilla.org/en-US/firefox/addon/6371) I need "http-on-modify-request" working for cached content. Please also consider to make setResponseHeader working for Content-Length which currently is READONLY and therefore throws NS_ERROR_ILLEGAL_VALUE on modification attempts. Reason: Quite a lot servers send wrongly calculated Content-Length (possibly caused by invalid calculations posted at http://php.net/manual/en/function.header.php and elsewhere) which prevents caching (see bug 588507) - but this request probably needs to be filed as another new bug(?).
Whiteboard: [firebug-p1] → [firebug-p1][netpanel]
Whiteboard: [firebug-p1][netpanel] → [firebug-p1][netmonitor]
I can confirm that this is still an issue in Nightly 44.0a1 (2015-09-23). And of course this is not just affecting Firebug but also the built-in devtools' Network panel. Sebastian
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