Report on Web Browser extensions for all web browsers.

Fields (not all fields will apply to all browsers' extensions):
timestamp
device_domain
device_name
default_hash
extension_id
name
description
key
version
permissions
default_locale
update_url
homepage_url
options_page
web_accessible_resources
content_security_policy
web_url
path
dev_tools_page
offline_enabled
creation_time
last_update_time

