Plugin vs add-on
                    (Zotero 7.0.15 (64-bit) here.)
When one goes to the menu Tools → Plugins, clicks on the button and then chooses Install Plugin From File, the dialog box' title is “Select add-on to install”.
It would be better to be consistent here and use either “plugin” or “add-on”.
                            When one goes to the menu Tools → Plugins, clicks on the button and then chooses Install Plugin From File, the dialog box' title is “Select add-on to install”.
It would be better to be consistent here and use either “plugin” or “add-on”.
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https://forums.zotero.org/discussion/122235/title-in-the-plugin-selection-windows-dialog-add-on-plugin