I apologize in advance if this has been answered before, but I have not been able to find one anywhere. I’m working on a project and I am wanting to make a Firefox Extension to display a tooltip when a user is entering information into a Username and Password input field. I have only been able to do this by creating a custom Web App separate from the extension project files and putting my css in the web app.
I tried making a css file inside the extension project with the same css code from the web app and then referencing that file in the content scripts inside the manifest.json but that didn’t work. I tried googling how to apply custom css inside a Firefox extension project and all I could ever find was people referencing current extensions that do it for you, but I don’t want that.
Any insight would be greatly appreciated and again, apologies if this has been answered before.