If I click on the ImageBlockX icon to block all images it changes icon and shows "Images are blocked" and blocks all images. But then, if I restart Firefox, it starts with ImageBlockX's icon showing "Images are blocked" but they aren't.

How to reproduce:

1. Start Firefox with ImageBlockX showing "Images are allowed"
2. Click on ImageBlockX's icon to make it show "Images are blocked"
3. Close all instances of Firefox and start it again
4. ImageBlockX's icon shows "Images are blocked"
5. Open any website to see that browser shows images

System information:

• Windows 10
• Firefox 57.0.4 (64-bit)

Workaround if this issue occurs:

1. click on ImageBlockX's icon to make it show "Images are allowed"
2. then click on the icon again to make it show "Images are blocked"
3. this time it will really do as it says and the addon will work correctly until you restart Firefox with images switched off again.