Damn, @mozilla is doing everything it can to make good folks hate it 
First Mozilla enables Google Safe Browsing, and then blocks accessing about:config on Firefox Android 
Google is banning @IzzyOnDroid for no good reason, yet I have to jump multiple steps to configure Firefox: that is, first to enable about:config by accessing chrome://geckoview/content/config.xhtml and toggling general.aboutConfig.enable to even access nasty browser.safebrowsing.* settings.
Google is known for breaking antitrust law, this may be yet another case of eliminating alternative app stores from the radar.
Seriously, Mozilla, why you are trying so hard to make everyone hate you?