Filezilla

3.42.1 (2019-05-08) min Mac OS X 10.9
https://download.filezilla-project.org/client/FileZilla_3.42.1_macosx-x86.app.tar.bz2

https://en.wikipedia.org/wiki/FileZilla#Criticism
Bundled adware issues

In 2013 the project's hosting site, SourceForge.net, provided the main download of FileZilla with a download wrapper, "offering" additional software for the user to install. Numerous users reported that some of the adware installed without consent, despite declining all install requests, or used deception to obtain the user's "acceptance" to install. Among the reported effects are: web browser being hijacked, with content, start page and search engines being forcibly changed, popup windows, privacy or spying issues, sudden shutdown and restart events possibly leading to loss of current work. Some of the adware was reported to resist removal or restoration of previous settings, or were said to reinstall after a supposed removal. Also, users reported adware programs to download and install more unwanted software, some causing alerts by security suites, for being malware.

The FileZilla webpage offers additional download options without adware installs, but the link to the adware download appears as the primary link, highlighted and marked as "recommended".

As of 2016, FileZilla displays ads (called sponsored updates) when starting the application. These ads appear as part of the "Check for updates" dialog.

In 2018, a further controversy about FileZilla's use of a bundled adware installer caused concern.