Please use and enjoy it, and if you can make a donation of any amount, we'd appreciate it immensely

How to fix this bad error message “Not available for Firefox 48.0” in 1 easy way?

You see this message “Not available for Firefox 48.0”? Do not worry! The Turn Off the Lights first add-on version uses the XUL technology, and that is different to maintain the JavaScript code than the other modern web browsers.

Not available for Firefox 48.0 issue. And user can solve it by installing the latest Firefox web browser

Since 24 August 2016, the Turn Off the Lights Firefox extension uses the WebExtensions technology that uses the same extension API supported by Google Chrome, Opera and Microsoft Edge. The API is also fully compatible with multiprocess Firefox (is called Electrolysis, sometimes abbreviated to e10s). The Electrolysis split Firefox into a UI process and a content process. The splitting UI from content means that when a web page is devouring your computer’s processor, your tabs and buttons and menus won’t lock up too.

I see a message when on the page “Not available for Firefox 48.0”

If you want to install the Turn Off the Lights Firefox extension on your web browser. And you see this error message “Not available for Firefox 48.0”? Then it best to update your Firefox web browser, because the following data is version 3.2.0.12 the latest support version in Firefox v48.

Version 3.2.0.12 – that is the last XUL version for Firefox v48
Version 3.2.0.15 and higher – that use the WebExtensions version for Firefox v49 and higher

You can download both files on this official Firefox extension gallery page.

PinLinkedInShares
Did you find technical, factual or grammatical errors on the Turn Off the Lights website?
You can report a technical problem using the Turn Off the Lights online technical error feedback form.

About The Author

Stefan Van Damme

Stefan Van Damme is the developer of the popular Turn Off the Lights browser extension, which he began building in December 2009 for Google Chrome. With over a decade of experience in the field, he has expanded the extension's availability to a wide range of web browsers, including Safari, Opera, Firefox, Maxthon, Brave, Vivaldi, Microsoft Edge, Yandex, and Naver Whale. His commitment to providing users with a quality product has made the Turn Off the Lights extension one of the most highly regarded and widely used browser extensions available. Additionally, the extension is free and Open-Source for all web browsers, and has been featured on major blogs such as Google, Microsoft, and Mozilla. With his extensive experience and knowledge in browser extensions, Stefan Van Damme is a highly qualified and authoritative figure in the field.