Please consider swapping context menu icon with a colorful variation. Personally, I think addons.mozilla.org/en-US/firefox/addon/google-image-search-reverse has the beautifullest.
Perhaps, adding an option not to use an icon at all would also be useful for some.
I used a gray icon because I wanted the menu item to look like it was part of the browser as much as possible. Unfortunately, WebExtensions require an icon to be shown on the menus, which is the same as the extension's icon. So, unless I changed the extension's icon to a blank one, the menu option also needs to have one.
