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.
The Keyword field in Firefox Bookmarks can be used to create shortcuts and smart searches. For some reason, sometimes if you define a new keyword, the latest keyword will be deleted. Keeping track of your keywords is hard though, since there isn't a way to list all keywords in use...
If you want to stop Evolution from running in the background, even if you don't use it, and save some RAM, here is a quick way. Supposedly, you can't un-install it, since other programs depend on it. But by preventing the file from being executed you can prevent it from starting.
Log in as root with sudo -i first, run these commnands, and reboot for it to take effect:
