Because Browserextensions are not so easy to create, I wonder if Userscript running with the help of Greasemonkey (Firefox Extension) or Tampermonkey (Chrome and Firefox Extension) are better.
Let me share my findings:
- Tons of Userscript are available
- Some Documentation is available but mostly not very recent
- Easy to deploy on your local Browser (no App Repository necessary)
- No Debugging.
- Limited or no access to the Browser itself.
It seems to me that Browserextensions are more powerful, especially when you need:
- Manipulate browser controls
- Manipulate files
- Do complex interaction between tabs or windows
- Track complex data/states across sessions and domains.
And for me very, very important:
- Search the available Userscripts if something fits for your need
- Learn from the existent Userscripts
- Convert your Userscript into a Chrome Extension