Selenium IDE is a very useful tool to create Selenium tests quickly. Sadly, it has been unmaintained for a long time and now not compatible with new Firefox versions.
Here is my work routine to create Selenium test without Selenium IDE:

Open the Inspector
Find and right click on the element
Select Copy CSS Selector
Paste to IDE/Code editor
Type some code
Back to step 2

That is a lot of manual work, switching back and for. How can I write Selenium tests faster?
The best way is to learn how your app is constructed, and to work with the developers to add an id element and/or distinctive names and classes to the items you need to interact with. With that, you aren't dependent on using the fragile xpaths and css paths that the inspector returns and instead can create short, concise expressions that will hold up even when the underlying structure of the page changes.
Since Selenium IDE is unmaintained, how to write Selenium tests quickly?