I was trying to use the 'ELECTRIC LIGHT BULB (U+1F4A1)' unicode on my site. Every platform shows the unicode different, even though I specify Symbola font on the font-family on the body tag (all characters use this font except for unicodes).
Linux: Symbola font
Windows: Segio UI font
Now this might not look like a problem because every platform shows the right icon. It is a problem when you try to change the color, which is something I expect from a character, does not work with emoji.
Also the characters showing different on every platform in general is kind of annoying.
How can I use unicodes effectively, avoiding differences across platforms?