Uploading a modified addon

Hi,

I modified a theme addon for firefox that was I think got abandoned by the author, and I have no idea what the best practices are. I want to publish it (so that it actually stays on my browser and isn’t temporary), but it says it has the same ID as an exisiting addon (the one that I modified). Am I just supposed to manually change the ID? Doesn’t seem right.

Help appreciated.

Yes, add-on IDs must be unique. Please refer this page for development guidance. https://extensionworkshop.com/