To do this, just by clicking on its icon in the toolbar, a sidebar will appear from which to select the element of the website that we want to change, either the title, the body of the text, among others, to modify it. If, in addition, we know its CSS we can change its code and enable its mode Readability that will allow us to reduce the website to its most basic elements, apply light, dark and sepia themes, adjust the font, the width of the text or the height of the line.
If we want to use Stylebot to change the image of any website, we can install it from the Mozilla Addon Store.
Stylus, install themes or create your own style for a website
This extension is a community driven style manager takes care of redesign our favorite websitesallowing us to easily install custom themes from popular online repositories or create, edit and manage our own custom CSS style sheets.
There are different themes to choose from, and even fun and random elements like a Nyan Cat YouTube progress bar, which may make this extension worth downloading for that alone.
Its user interface is highly customizable, including themes, optional layouts, icon and badge color options, along with many other settings. It has two different optional code validators with different rules that we can configure. Against it, it must be said that the most inexperienced users may find its interface somewhat messy.
If we want to redesign our favorite websites, we can choose to download Stylus from the Firefox Browser Add-on.
Tranquility Reader, improves the readability of a web interface
By using this add-on for Firefox we will be able to make the interfaces of web pages more readable, eliminating any element that can distract us while we try to read any article, always keeping the main image and the entire body of the text. We can extension quickly turn on or off with the push of a button and without having to refresh the page.
Among its features, it should be noted that it offers compatibility with NoScript and allows us to save the content of the page so that it is available offline, having the ability to export and import the content offline. It also allows us to customize the font, its size and colour, as well as the background color and the width of the reading area of a website.
To be able to use Tranquility Reader for free, simply download it from the Mozilla Add-on Store.
Improve YouTube, customize and change its appearance completely
As we can imagine from its name, this extension allows us to modify a large part of the interface of the famous streaming video platform. We will be able to customize everything from the color of the player to the side of the screen where the list of recommended videos is shown. Dispose of over 85 unique and useful features to improve the appearance of YouTube, being able to configure the video player, the theme, the design and the style of the platform.
Its greatest advantage is that it is an intuitive and easy-to-use plugin, since just by pressing its button we will have access to the Player, Themes and Appearance categories from where we can select the elements to modify by simply activating and deactivating any lever or slider , so it can be used by all types of users.
Improve YouTube is a free extension that we can download from the Firefox Add-ons Store.
Stylish, style manager and editor for any website
Through the use of this add-on for Firefox we will be able to apply different styles to web pages that we want, because we are dealing with a style manager and editor, especially aimed at users who know CSS and want to dare to create their own customization layers to change the style of a website, thus improving our browsing experience.
It has an online repository, so we won’t need to know how to write styles, since we’ll just need a couple of clicks to give a website the desired style. However, its main drawback is that many users notice that it has spyware to record the history of our web browsing.
If, despite this, we want to download Stylish and try it, we can do it from the Firefox Store itself.
Extensions to darken a web
If what we want is not drastically capable of designing a web, but simply being able to provide it with a darker mode to view its content comfortably, we can opt for
AutomaticDark, changes the Firefox theme based on the time of day
It is an extension with a very simple and useful function. With this tool we will be able to change the Firefox theme depending on the time of day, so both the browser and the content that we are viewing will darken along with the day.
For this we can share our location with AutomaticDark, so that it can automatically determine the perfect moment for the change. However, if we are concerned about our privacy, we can also set sunrise and sunset times manually.
While dark mode is something that has been around for a while, what really sets this add-on apart is that we don’t necessarily have to choose a dark mode as there are 21 themes to choose from including those that Firefox has by default. Although this does not affect the content of the website, it does help protect our eyes from the effort.
Download AutomaticDark for free from the Firefox Store.
Turn Off the Lights, darken a page when watching a video
This extension allows us to completely darken any page and in this way to be able to see any video as if we were in the cinema. It is compatible with the main streaming video playback websites such as YouTube, Vimeo, Hulu, Twitch, Dailymotion, among others.
A simple click on its button will be enough for the page to begin to fade until it is completely dark so that we can comfortably focus on the video. Just by pressing the button again, the page will return to normal. The extension automatically plays videos in HD, allowing us to change the resolution up to 8K.
We can download Turn Off the Lights from the Mozilla Store.
Dark Reader, adjust brightness and contrast when visiting a website
We are talking about a free and open source extension with which it is possible set a dark theme for any website that we visit In this way, we will be able to take care of our eyes whatever time we navigate. The plugin is responsible for creating a dark theme for the web that we visit instantly, inverting bright colors, making them contrasting and easy to read in low light situations, such as at night.
The extension allows us to adjust both brightness and contrast, use a sepia filter, a dark mode, as well as configure fonts. In addition, it does not display advertising and does not collect or send user information. Its main drawback is that its use can cause the browser to frequently slow down on certain web pages.
Download Dark Reader from the Firefox Browser Add-on.