Ask HN: What browser extensions have you built for yourself?

This seems sightly masochistic

Deep Thought Tabs https://addons.mozilla.org/en-US/firefox/addon/deep-thought-...

Adds funny, profound observations in newly opened empty tabs, with fresh images each time.

    - WebExtension written in plain JavaScript. No libraries. No cruft.
    - Displays "deep-thoughts" even in offline-mode (no background-images).
    - Fetches relevant fresh background images each-time from Unsplash and Flickr.

Checkout the source to learn how to create simple webextension addons for Firefox in JavaScript.

Few interesting bits of code:

    * Fisher-Yates shuffle algorithm.
    * Ken-Burns effect for still images.
    * Visual (image-preview) tooltips in CSS.
    * Asynchronous XMLHttpRequest.

I had built and published 4 different Chrome extensions:

- Random Facts: a random fact about numbers with a beautiful image on new tabs. https://chrome.google.com/webstore/detail/random-facts-on-ne...

- Game of Thrones Quotes: a random GoT quote on every new tab. https://chrome.google.com/webstore/detail/game-of-thrones-qu...

- Open Wikipedia: an extension to overcome the Wikipedia blocks in Turkey. https://chrome.google.com/webstore/detail/wikipedia-a%C3%A7%...

- Open Imgur: an extension to overcome the Imgur blocks in Turkey. https://chrome.google.com/webstore/detail/imgur-a%C3%A7%C4%B...

All of the extensions are open source; the links can be found in the extension descriptions.

My highschool ( I just graduated) has a some sort of gradebook management software used by the teachers / admin / parents / students to view and manage grades, attendence, payment, and so on. The frameowkr used is down kind of convoluted framework Enterprise software combination that the school purchased. And for some reason the school let us see our points erned on ecah assignment out of the total but only showed the letter grade and not the percent for the class. So calculating weighted grades by hand to figure out your class percent was a huge pain for everyone (and some teachers didn't like if you asked them.to show you your percent which they had access too). So one of the first experiences I had writing stuff with js and web technologies was writing an extension to take in all the grades, parse them, and calculate grades based on percents imputed for weighted catagories. Everyone thought it was cool and it became a big thing. I was even super stoked when I got it to save and load the weights using chrome local storage so you don't have to input it everytime. Even though it's pretty simple software, it was my first experience seing the actual impact on my peers every day by some price of software I write.

https://chrome.google.com/webstore/detail/tripoli/jmiafjndie...