![]() We will create a Firefox extension to find all links in the current web page, highlight those which have a target attribute and alert you how many links it found. If you are the developer of a legacy add-on, please refer to this page for resources to help you migrate to the current API. Please do not reference this article for extension development, as it is out-of-date. You can find reference documentation for the WebExtensions API on MDN. We encourage you to visit Extension Workshop to learn more about browser extensions and how you can build an extension for Firefox. ![]() Similarly to our use of the get method, to set the storage we can use or : Firefox has used the WebExtensions API as its extension API since 2017. We’ll need to create assets/js/options.js, which will listen for the submit event for the form and set alarms in the sync storage, adding a new alarm to the array. Here, we’re just displaying a form with two input fields: “Alarm Name”, which will be the text displayed in the alarm when the notification is sent, and “Time”, which is the time to set the alarm at. We’ll create it in the root of the project with the following content: Options Add Alarm Alarm Name Time You can create it anywhere in the add-on project directory. Let’s first create the file options.html. In our add-on, we’ll use the Options page to allow the user to create alarms. Then you link to it in the manifest.json file. To allow your users to customize or edit options or settings in the add-on, you create an HTML page that holds the options and the logic behind setting or changing them. You’ll notice that nothing has changed in our popup, since we don’t have any alarms added yet. You can remove the old one to avoid conflict. This is because we explicitly specified the ID in the manifest.json. If we reload the add-on now, you’ll notice a new installation of the add-on has been added. If there are no alarms available, we’re just showing “no items available”. If there are, we’re looping over them and displaying them using the appendItem helper function, which just appends an HTML list element li to #alarmsList. We’re then checking if there are any alarms. When the document is ready, we’re using to get the alarms created by the user. You’ll also need to include this file in popup.html. Then add a manifest.json with the following content: Recommended sizes to add are 16px, 32px, 48px, and 128px.įor our add-on, let’s start by creating a folder named firefox-alarms-addon. These icons will be used in the settings, toolbar of the browser, and other places as well. icons: a list of icons of different sizes.description: a short description for your add-on that explains its purpose.The following two are optional but recommended: These’re the mandatory fields for any add-on. However, if future support for V3 is added, the value can be 3 as well. manifest_version: at the time of writing, Firefox only supports Manifest V2, so the value for this should be 2. #MOZILLA FIREFOX EXTENSIONS SETTING UPDATE#When updating anything in the extension, you’ll need to update this version, so it’s recommended to start low.
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