Edge: browserAction.setIcon not working when using a default icon with multiple sizes

Question

I can\'t get browser.browserAction.setIcon to work in Microsoft Edge when manifest.json is specifying a default icon in multiple sizes:

manifest

Answer 1

In the end I came to the conclusion that Edge doesn't like string values for the browser action icon path, neither in manifest.json nor in browserAction.setIcon, it fails silently without producing any error.

A way to make it work is to always set explicit sizes in both manifest.json and in every browserAction.setIcon call, even if the different sizes all point to the same image.

manifest.json

{
  "manifest_version": 2,
  "name": "test",
  "version": "0.0.1",
  "author": "John Doe",
  "background": {
    "scripts": ["background.js"],
    "persistent": false
  },
  "browser_action": {
    "default_icon": {
      "19": "icon.png",
      "38": "icon2.png"
    }
  }
}

background.js

browser.browserAction.setIcon({
    path: {
      "19": "testimage.png",
      "38": "testimage.png"
});