Is there a way to host a favicon on Google Drive for a Google Web App?

Question

I have made several attempts to host an .ico file in Google Drive to use as a favicon for a Google Web App with no success. It just seems a little strange that there would be a .setFaviconUrl() method without a way to host .ico files.

So far I have tried:

To link to a publicly shared .ico file on Google Drive with https://drive.google.com/uc?id=IMAGEURL
Inserting an .ico file in a public Google Site and linking to the file's url

Both attempts give me the error:

The favicon icon image type is not supported.

I just upload to imgur if there isn't a relevant domain to host it on. Google Drive is not supposed to be used as a content delivery network. — tehhowch, Aug 06 '18 at 20:36
I just took a look at imgur. They do not seem to support .ico images — webstermath, Aug 06 '18 at 21:04
Using `.png` does work. Thank you for the suggestion. However, I still would prefer to be able to stay within Google. — webstermath, Aug 06 '18 at 21:31
Wanting to use Google Drive as a CDN does not mean Google wants you to or has to let you. They have an entire business suite meant for that kind of thing - Google Cloud Platform. — tehhowch, Aug 06 '18 at 21:35
inserting a .png file on a public google site should work though — e__n, Aug 07 '18 at 02:12

score 3 · Answer 1 · edited Nov 13 '22 at 16:19

Took me a while to figure this out, if anyone needs this in the future.

You need to trick .setFaviconUrl() into thinking the image is a png without altering the link to the file. It seems like it checks the last 3 characters, so adding '&format=png' to the end of the download link was able to fix the issue for me.

Example: https://drive.google.com/uc?id=IMAGEID&export=download&format=png

Is there a way to host a favicon on Google Drive for a Google Web App?

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