When comparing Mozilla Thunderbird vs FreshRSS, the Slant community recommends Mozilla Thunderbird for most people. In the question“What are the best RSS readers for UNIX-like systems?” Mozilla Thunderbird is ranked 6th while FreshRSS is ranked 7th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free (as in freedom and beer)
Pro Available on Linux, OS X and Windows
Pro Very reliable
Version after version, Mozilla Thunderbird works as expected.
Pro Good filtering system
Mozilla Thunderbird offers a flexible filtering system with the ability to set flags and read/unread, as well as sort/assign to new mail directories. There are also numerous plugins available to assist in the filtering.
Pro Large assortment of plugins available
Mozilla Thunderbird offers a huge amount of extensions to expand the usability and options of the client.
Pro Great flexibility
More options and extended settings than most power users could dream of. Get it working how YOU want.
Pro Tabs for navigation
Pro Lightning Calendar and Address Book integration
Pro Consistent and involving a moderate learning curve
The app design of Mozilla Thunderbird has not changed significantly since its beginning, making its learning curve almost non-existent.
Pro Send large files easy
Install pCloud plugin for Thunderbird and your files (upto 20 GB free storage included) will be received as download links
Pro Full control
Licensed under AGPL 3 and self-hosted.
Pro Polite and respectful community
You can ask questions and receive answers. It seems normal on the surface, but that's currently almost an unique feature for an OSS.
Pro Fast
As someone who used Tiny Tiny RSS for many, many years (and sill likes it) I will say that FreshRSS is noticeably faster. Feed checks are quick and jumping into the menus to configure it is effortless.
Cons
Con Development slowed to only focus on stability and security
Mozilla Thunderbird has slowed down its development of features to only focus resources on security and stability.
Con Outdated interface
Thunderbird's interface is very outdated and unpleasant. It feels more like a Windows XP application than like a modern MacOS one.
Con Terrible integration with macOS
Simple things - drag/dropping pictures doesn't work, for instance.
Con Subject lines can (temporarily) disappear from the list
This is sporadic behavior.
Con Serious bugs
Clicking on a subject line can bring up the wrong email.
