Back in 2004 a neat little browser extension called "Greasemonkey" was created that allowed for the management of custom javascript snippets to be run on the browser after or before the page is loaded allowing customization or augmenting the browsing experience.

This has sometimes been used as alternative to web browser extensions. With the bonus that the code is shown directly available for you to read before you accept to install it, so you can evaluate if the script is safe. Updating the script is also uptional and will show you the diff of the changes.

Because of this, for security reasons I tend to prefer small userscripts that are easier to review. And this has let me to sometimes resort to writting my own small and custom scripts trying not to sacrifize functionality and usefulness while keeping the line count and complexity on saner levels.

How to install

1. Install first a script manager extension. A popular and portable open source option is Tampermonkey.

2. Visit on a link to a user script javascript file (filename ending with .user.js). The script manager should show a UI allowing you to review and install the script.

Userscripts

• Save/Load Form Data

  Save the content of forms and reuse those values later

  Version

  1.2

  Last update

  Jan 21, 2025

  Applies to

  all websites

  License

  GNU GPLv3

  LOC count

  109

  Author

  Ferk

  It'll allow you to store the content of web forms for later use, and keep multiple named presets that will be stored specifically for each domain.

  This is useful to automate some tests or in general to make filling long forms less of a hassle.

  Any preset named "default" will load automatically.

  Install userscript

• Auto Dark Mode

  Detects the page lightness and enables Dark Mode when appropriate.

  Version

  1.7

  Last update

  Nov 24, 2024

  Applies to

  all websites

  License

  GNU GPLv3

  LOC count

  74

  Author

  Ferk

  Applies a dark mode style only when the page is detected to have a light background.

  Install userscript

• Audio/Video Link Finder

  Find the links to all video/audio media tags, as well as iframes

  Version

  1.0

  Last update

  Oct 27, 2024

  Applies to

  all websites

  License

  GNU GPLv3

  LOC count

  60

  Author

  Ferk

  A simple way to get the raw links to open them in a new tab or for easier download.

  Note that this won't work well in websites that provide the media data in other ways, such as the cases where there might be some "blob:" links, for example.

  The iframes will be searched through recursivelly, if they are from the same domain (or if they have explicitly allowed cross-origin communication).

  Install userscript

• ImageZoom Right-Click

  Zoom on images with the mouse wheel while holding right-click on them.

  Version

  1.6

  Last update

  Apr 2, 2023

  Applies to

  all websites

  License

  GNU GPLv3

  LOC count

  104

  Author

  Ferk

  Right click and a dialog with the original image will show, it'll disappear if you release the right click, but if you scroll the dialog will zoom and stay put until you click outside.

  It should work also on background images, or in images that are layered, covered by some html text but if there's a transparent image over it, it might pick up the transparent one before the one below. To prevent unintended activation, the dialog will only show if there's no text selected.

  It uses 'pixelated' as rendering mode so you actually can see the pixels when zooming which I personally prefer over a blurry mess.

  Install userscript

• Favicon replacer

  Set custom favicons for any website, either an image or an emoji.

  Version

  1.0

  Last update

  Sep 15, 2022

  Applies to

  all websites

  License

  GNU GPLv3

  LOC count

  19

  Author

  Ferk

  For each domain name a custom favicon can be set, overriding the favicon on the website.

  To select which favicon to use, you can make use of the userscript menu (from your userscript extension) to find an option where you can set a custom URL or emoji for each website.

  Install userscript

• zap

  Zap distractions from websites.

  Version

  1.1

  Last update

  Sep 14, 2022

  Applies to

  all websites

  License

  GNU GPLv3

  LOC count

  27

  Author

  Ferk

  This is not something you might want to have enabled all the time, but when you do use it, it will clean up distracting content from the websites to make them more readable.

  Most fancy components will be removed/hidden. Colors will be replaced. Images will be faded out (with some fade in on hover).

  Install userscript

• Apt-linker

  Turns "apt-get install" lines into "apt://" apturl links

  Version

  1.2

  Last update

  Sep 14, 2022

  Applies to

  all websites

  License

  GNU GPLv3

  LOC count

  31

  Author

  Ferk

  Turns "apt-get install" lines into clickable apturl links for installing Ubuntu and Debian GNU/Linux packages This extension is intended to ease the life of Ubuntu/Debian users who browse the Internet searching for software, tutorials, etc.

  Apt: urls are a way to install packages by using a protocol handler to read the list of packages to install.

  This extension will turn lines of text describing commands for installation into clickable links that allow you to install the packages with just 2 clicks.

  More info about AptUrl can be found here: https://help.ubuntu.com/community/AptURL

  Install userscript

• Qwant Endless Scrolling

  Infinite scroll for Qwant.

  Version

  1.0

  Last update

  Jul 9, 2022

  Applies to

  www.qwant.com

  License

  GNU GPLv3

  LOC count

  3

  Author

  Ferk

  A simple infinite scrolling script for Qwant.com

  Upon scrolling to the bottom of the page, the "show more" button will be automatically pressed.

  Install userscript