Since you can't change mp3 "Open with" "Default application" from Audacious to fx VLC under Properties in Ubuntu 16.04, and it is annoying to get your playlist deleted every time you open a single mp3-file, here is a work-around.

Go to File > Settings > Playlist and uncheck "Clear the playlist when opening files".

When you reply to a message or create a new message in Thunderbird, the default format is "Paragraph".

To change it to "Body Text", deactivate the "Use Paragraph format..." option under Edit > Preferences > Composition > General, and the default paragraph format changes from "Paragraph" to "Body Text".

To install and run Needrestart:

sudo apt-get install needrestart
sudo needrestart

For more info: When to Restart Services or Reboot after Update on Debian or Ubuntu

The program at Github: https://github.com/liske/needrestart

With Scrapy you can crawl web sites and get their content, mainly text and images. Since it isn't possible to install Scrapy with sudo apt-get install scrapy, the recommended way is to install it inside a virtual Python environment called Anaconda.

With these commands you can get Scrapy up and running on Ubuntu 16.04:

I prefer to keep Thunderbird messages bold (unread), until I have opened them by pressing Enter, or marked them read by pressing M.

The only way I have found to get this behavior is go to Edit > Preferences > Display > Advanced, select "Automatically mark as read", select "After displaying for seconds" and enter a very high number in the seconds field.

October is an up and coming CMS, with a growing user base "October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. A simple and modular CMS that grows with you, with a precise and beautiful interface that comes as second nature." From: https://octobercms.com/

From Firefox 57 onwards, Add-ons will stop working and be replaced with WebExtensions. One very used Add-on is Self-Destructing Cookies, but this extension will not be rewritten as a WebExtension. As a replacement you can use Cookie AutoDelete.

If you have an image file attached to a Thunderbird e-mail message, it's easy to delete at the bottom of the message, by right-clicking and selecting Detach. But if the image is embedded, you don't have that option.

Vivaldi is a freeware, cross-platform web browser, launched in April 2016. It uses the Blink rendering engine, same as Google Chrome and Opera do, so you can install extensions developed for Google Chrome.

First, install the Steam client:

sudo apt-get install steam

This will add the Steam client under "Applications".
After that, just download the games via the GUI.