Webgl facebook integration

Good Day,

I have problem with login to facebook from my webgl app ( on localhost ). There is no problem when i run my app in editor or in android device.

Can i login to FB from webgl ( not facebook canvas - simple www ) using only Unity? Or i have to use php or something else? - it would be a nightmare =/

I need this for sharing photo from app.

I have resposne from my wwwconsole something like: "Application error,There has been an error with downloading/retrieving data for the application. Application may not be correct or there could have been a temporary technical problems. Please try again later."

EDIT. I found solution... in google:

 Application.OpenURL (FACEBOOK_URL + "?app_id=" + FACEBOOK_APP_ID +
             "&link="             + WWW.EscapeURL(linkParameter) +
             "&name="             + WWW.EscapeURL(nameParameter) +
             "&caption="         + WWW.EscapeURL(captionParameter) + 
             "&description="     + WWW.EscapeURL(descriptionParameter) + 
             "&picture="         + WWW.EscapeURL(pictureParameter) + 
             "&redirect_uri="     + WWW.EscapeURL(redirectParameter));

But now i have another problem :) How can i upload picture not from web... I am making screenshot from my app and i want to send it - dont know how? I was trying to upload photo from localhost or hdd but no success.