I use HTTPS Everywhere extension for Firefox, and recently I've started witnessing Mixed Content warnings from time to time, apparently when there are images with
http:// prefixes (in particular at SE sites, on pages with
As I've learned, HTTPS Everywhere should deal exactly with those kind of things by changing prefixes to https.
I've also created a new profile to install only HTTPS Everywhere (to test 'some conflict between extensions' hypothesis), but it still gives the warning with similar circumstances.
What could be the problem and what should I do with it?
(software versions: Firefox 44.0.2; HTTPS-Everywhere 5.1.4)
(Originally I've posted this question on meta, but was suggested to ask this question here.)