- Don’t use Stylish! Use Stylus instead! (links see this comment; also note that Stylus works great on the mobile version of FireFox)
- Isn’t Edge now based on Chromium? According to Google you could try this:
- Open Microsoft Edge.
- Click the main menu (threed-dotted) button in the top-right and select the Extensions option.
- Turn on the Allow extensions from other stores toggle switch.
- Click the Allow button.