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About this Add-on
Tampermonkey will give you much convenience in managing your userscripts. It provides features like easy script installation, automatic update checks, a simple overview what scripts are running at a tab and a built-in editor.
You can also import and export your scripts and settings via some popular cloud storage services (Google Drive, Dropbox, OneDrive).
Note: Firefox's WebExtension API is currently considered to be stable, but not complete. It still has incompatibilities and some issues. This means Tampermonkey has (besides it's own bugs ;) still some issues caused by faulty or non-existent APIs and/or features.
Enable webRequest support at Firefox 52+ to fix many GM_xhr related issues (finalUrl, cookies, ...)
Fix missing action menu icon at internal tabs
Make xhr response headers available at readyState 2 and higher
Add time and browser to backup names
Fix relative URL handling
Fix sync issues of script comment properties
Fix doubled include/exclude editor dialogs
Make * include file URIs as well
Update the ES6 script template
This add-on is not compatible with your version of Firefox because of the following: