Hey there and thanks for the review! :)

Usually you just have to change the "icon URL" to the image that you want. Did changing the icon URL not work? For example, you can use this for the new Google Maps logo:

https://www.google.com/images/branding/product/ico/maps15_bnuw3a_32dp.ico

By default SSS uses the faviconkit website, and they seem to have a Google Maps icon that is the same as the main Google one.

Please let me know if something else is wrong via email or the Github issues page. (Unfortunately I may not be notified of updates to these reviews.)

Daniel