The webapps just take a thumb of whatever image they can find on the page, can I customise it?
5 Answers
For Gnome-Shell (Ubuntu 12.10), the image is located at ~/.config/epiphany/app-epiphany* (where the * in app-epiphany* is the web app name followed by and some additional numbers/letters)
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Additionally, you'll want to open the respective folder and edit the app-icon.png inside with gimp (or create a new one with inkscape then export it as a png). – airtonix Sep 30 '13 at 05:42
Replace the image file called app-icon.png in ~/.config/epiphany/app-epiphany* or ~/.gnome2/epiphany/app-epiphany* (where the * in app-epiphany* is the web app name followed by and some additional numbers/letters).
For instance, for a webapp called coolap, it could be ~/.config/epiphany/app-epiphany-coolapp-12512912r1unr1i25n124/app-icon.png.
Then restart Unity (ALT+F2 ,then type “unity” and press ENTER) or GNOME Shell (ALT+F2, type "r", ENTER).
For me the path was ~/.local/share/epiphany-appname-*.
Filename is app-config.png as well.
- Epiphany v3.36.4
- Gnome v3.36.8
- Ubuntu 20.04
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For me the path was ~/.local/share/org.gnome.Epiphany.WebApp-appname-*. Inside that directory I could find "app-icon.png". Replacing that icon with a different one worked great after restarting Gnome like @elchapu described in his answer.
I'm using Epiphany 3.38.3 on Fedora 33.
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Fedora is off-topic here. What you found in Fedora may or may not be relevant. In this case it isn't. – ChanganAuto Jun 16 '21 at 16:42
Try menulibre.
sudo add-apt-repository ppa:menulibre-dev/devel
sudo apt-get update
sudo apt-get install menulibre
Menulibre is really easy to use - hopefully it'll work with the webapps (it works with Unity-webapps). You can access it from the settings menu, or just type "menu" into the dash, and open the one called "Menu Editor."
Also, check out the developer's site here.

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