Нужны Promotional tile previews и App icon для Chrome extension "Instant Multilingual PDF/HTML/TXT Translator" ( https://chrome.google.com/webstore/detail/instant-multilingual-pdfh/fcbnhmalionocfajdkpnlhmekghnmbii ). Ранее установленные пришлось удалить "because of the unauthorized use of the Adobe PDF logo trefoil design".
Требования по промо и иконке: https://developer.chrome.com/webstore/images
Кратко об иконке:
You must provide a 128x128-pixel app icon image.
The actual icon size should be 96x96 (for square icons); an additional 16 pixels per side should be transparent padding, adding up to 128x128 total image size.
The image must be in PNG format.
The image should work well on both light and dark backgrounds.
Кратко о промо:
Small: 440x280 pixels
Large: 920x680 pixels
Marquee: 1400x560 pixels
Make sure your image works even when shrunk to half size.
Assume the image will be on a light gray background.
Use saturated colors if possible; they tend to work well.
Avoid using a lot of white and light gray.
Fill the entire region.
Make sure the edges are well defined.