Import system preferences keyboard shortcuts to other apps

I enjoy using shortcuts on my mac ["gm" for "good morning"]. But I use browsers Firefox and chrome. I have only found a way to recreate them using "key sequence" and applescript to type it in.
Is there a way to import my list of shortcuts easier than typing all of them out?

The only other method that I know is to use the json format to import them.
Now depending of your skill on programming you might consider that as more simple or more complicated...