> making an extension is a fun and efficient way to create useful software, especially when you can only invest limited time and effort. Instead of starting fro

> making an extension is a fun and efficient way to create useful software, especially when you can only invest limited time and effort. Instead of starting from a blank slate, you can start by tailoring some piece of existing software to better serve your own needs ...and a quick way to get burned out due to churn from incompatible changes (either from websites or browsers) breaking your project. What you're looking for may be modifying an existing Free Software project you use instead, which is something I wholeheartedly recommend. There's often a high chance that you'll be able to upstream your changes, making it better for everyone and taking ongoing maintenance out of your shoulders - unless you actually want to maintain it as your own, which is also something you're free to do.