> Find Picture >Right click, select "Copy image location" (Might be different depending on browser) >Go to Edit Signature >click this >Paste Image location link >win Edit: same thing works with gifs (example image location: https://i.gyazo.com/a4d1af38b79e74ff2c6d0cd10fc6330a.gif )
Also use a url shortener on images so you dont use too many lines if you want more in your signature.