Choose Manage Firefox Extension in the list. This will let you install the extension in Firefox. It will open up Firefox and from here, you can click on Install, Allow and finally Add in order to add the extension to Firefox. The extension should be up and running now. Check that Dashlane is working in Firefox
Aug 25, 2015 Add or remove browser add-ons, extensions, and toolbars Jan 31, 2020 Add-ons - Mozilla | MDN
Jun 05, 2014
How to Add a Button to the Firefox Toolbar To add a new button to the Firefox toolbar, right click on any of the toolbar icons and a menu should appear as shown below. Now click on the Customize option as indicated by the red arrow in the Example extensions - Mozilla | MDN load the extension from its source folder using the Load Temporary Add-on feature. The extension stays loaded until you restart Firefox. open the extension's source folder at the command-line and use web-ext to run the extension. The extension stays loaded until you restart Firefox. in Firefox use File > Open File and find the example in the
Firefox add-ons, sometimes also called extensions or addons, are small programs written in JavaScript that add, remove or modify functionality of the Firefox Internet web browser. The majority of browser extensions for Firefox are community-based, with only a handful of official additions by Mozilla employees. Add-ons serve a variety of purposes, from adding functionality to the Firefox
In Firefox: Open the about:debugging page, click "This Firefox" (in newer versions of Firefox), click "Load Temporary Add-on", then select any file in your extension's directory. The extension will now be installed, and will stay until you restart Firefox.