firefox-backgroundimg-swaper

You can use this script to set the background image of your mozilla firefox browser and make computer randomly choosing one of pictures you provided.

Setup

1. Go to about:support in the address bar. View the section "Application Basics" ➔ Profile Directory (or "Profile Folder" on MacOS) ➔ click the button "Open Directory" (or "Show in Finder" on MacOS)
2. Create a directory called chrome inside the opened directory, if it's not already there.
3. Go to the chrome directory and create a directory called img. Move your image to the img directory.
4. Now you could git clone the repo to the chrome folder
5. Make swapimage.py executable and add to crontab
6. Go to the url about:config, accept the risk (we will not really do anything harmful here, nothing to worry about), and in the Search Bar, paste toolkit.legacyUserProfileCustomizations.stylesheets, and set the value to true. This tells Firefox to load the CSS file at startup.

For those who love copy pasting 😉

Inside profile directory:

mkdir chrome
cd chrome
git clone https://github.com/miki164/firefox-backgroundimg-swaper.git .
chmod +x swapimage.py
sudo crontab -e

Now you have to add crontab entry. Here it's a very useful Link

In my case working somethnig like that:

SHELL=/bin/bash
@reboot ~/.mozilla/firefox/aolcyudt.default-release/chrome/swapimage.py  ~/.mozilla/firefox/aolcyudt.default-release/chrome/img/

Remember to to set enable css loading look step 6