An extension that runs on all tabs should be open source.
One thing I'm missing from old firefox, can you add config to allow us to change the menu entry to "View Image (filename)" for example: "View Image (background.png)"?

It adds the context menu item back, but adds it at the bottom of the context menu, not up in the same group as the other image-related context menu items (such as copy image and save image as). I almost didn't even see the button as a result, and as a result I almost gave a 1-star review for it failing to even add the context menu item back. Then I looked at the screenshot here that shows that the menu item was added, but just on the bottom, and I verified that to be the case. But yeah, not having it up with the other image related context menu items is a HUGE mistake on the part of the designer of this extension. It absolutely SHOULD be up with the other image-related context menu items. This could easily be a 5-star extension, but I had to take away 2 stars for the massively terrible technique it uses by adding this context menu item at the bottom of the context menu, instead of inserting it in the group of other image-related context menu items. Until this problem is fixed, I'm giving this extension only 3 stars.