I recommend to install add-On [AMO Browsing for SeaMonkey](https://unofficialseamonkeynews.wordpress.com/?s=browsing) from [here](https://addons.thunderbird.net/en-US/seamonkey/addon/amo-browsing-for-seamonkey/?src=ss). It will add an extended Version history view with information concerning kind of Add-on type. Versions with hint "WebExtensions" on red background will not work. I will file a RFE that this hint will be added to Release Notes. I woder whether this extension should not be bundled with SM Releases - it's essential for appropriate UX.
Bug 1633194 Comment 5 Edit History
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I recommend to install add-On [AMO Browsing for SeaMonkey](https://unofficialseamonkeynews.wordpress.com/?s=browsing) from [here](https://addons.thunderbird.net/en-US/seamonkey/addon/amo-browsing-for-seamonkey/?src=ss). It will add an extended Version history view with information concerning kind of Add-on type. Versions with hint "WebExtensions" on red background will not work. I will file a RFE that this hint will be added to Release Notes. I wonder whether this extension should not be bundled with SM Releases - it's essential for appropriate UX.