If problem in third party apps,
please add third party repositories to software source then try install click.

or not,
please check your Firefox configuration about apturl.

Type in “about:config” in the location bar.
Right click, select New –> String
Type in “network.protocol-handler.app.apt” in the name of string,
and type in “/usr/bin/apturl” in the value.

One more right click, select New –> String
Type in “network.protocol-handler.app.apt+http” in the name of string,
and type in “/usr/bin/apturl” in the value.