On 9/21/15 3:59 AM, Mike West wrote:
> On Mon, Sep 21, 2015 at 12:28 PM, Jose Kahan <jose.kahan@w3.org
> <mailto:jose.kahan@w3.org>> wrote:
>
> Today we had a news item with an absolute HTTP link to an image
> and this
> revelead it. Firefox will also complain if there are absolute http
> links to CSS files.
>
>
> Is it possible that you're relying on `Upgrade-Insecure-Requests`, and
> that you're using a version of Firefox which doesn't yet support it? I
> think they're shipping in 42.
Firefox supports the upgrade-insecure-requests in versions 42+. Firefox
42 is currently in beta and goes to release on November 3rd.