skel: add snapfly menu to autostart
etc: iceweasel: security: disable malware detection
https://wiki.mozilla.org/Security/Features/Application_Reputation_Design_Doc#How_to_turn_off_this_feature
> When a binary file is downloaded, the user-agent extracts several pieces of metadata about the file
> The browser performs local lookups whenever a binary file is downloaded. If a local result is not found, the user-agent may perform a remote-lookup
> Google has offered an application reputation feature to detect malicious downloads as part of Google Safe Browsing since 2012
doc, packages: add logtop as alternative package