Triangle icon (grey not orange) showing up after logging to facebook
When I sign into Facebook, I get a grey triangle icon and it states that the site is not fully encrypted. I'm running the latest version of Firefox 26 and after doing some research I found out that it's usually orange but in my situation it's grey and I'm sure most of the sites I visit are safe but I noticed it on sites like Aol and Facebook mostly.
What does it mean exactly and why is it only showing up after the latest update few days ago?
Screenshot of the icon:

Moambuepyre
Opaite Mbohovái (8)
That means that all the info on the page is not secure, but it is mixed and allowed (possibly allowed).
ALSO SEE: Mixed content blocking in Firefox
Thanks. I've never seen it before and thought it's weird that I keep seeing that icon next to the padlock the past few days and its currently visible while I type this on here.
But I'm guessing its normal then and shouldn't worry about it right?
You can see mixed content as lines with red text in the Web Console (Firefox/Tools > Web Developer;Ctrl+Shift+K).
I understand what the icon means now, but is it normal and safe to be getting it almost on every site that requires log-in information such as facebook, aol, university website mail, etc.?
Normally you would only see this icon in rare occasions and not on almost every web page.
What kind of content show as mixed content in red?
From which servers does this content come?
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
- Do NOT click the Reset button on the Safe Mode start window.
I have no extensions or themes installed. All I have installed is Shockwave Flash. I signed into Facebook and the icon was there so I checked Web Console and there was only one red line that said "loading mixed (insecure) display content on a secure page http://cs.atdmt.com..."
After checking atdmt it looks like its a Facebook tracking cookie (I think?) and I get the same triangle icon on 2 other computers (mac and windows) here at home when I sign in to Facebook or here on the support page. I'm not sure what that means but I do know that this triangle icon started showing up after installing Firefox 26 and usually refreshing the page on Facebook gets rid of it.
So what does that mean? Am I the only one getting this icon when signing into Facebook and some other sites?
Moambuepyre
I have the same problem. Is it safe to leave alone.
Well anyone else getting this icon? And is it safe to ignore?