The Stealthwatch Cloud Private Network Monitoring (PNM) Sensor is an extremely flexible piece of technology, capable of being utilized in a number of different deployment scenarios. It can be deployed as a complete Ubuntu based virtual appliance on different hypervisors (e.g. -VMware, VirtualBox). It can be deployed on hardware running a number of different Linux-based operating systems. Reference: https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2019/pdf/5eU6DfQV/LTRSEC-2240-LG2.pdf capable of being utilized in a number of different deployment scenarios. It can be deployed as a complete Ubuntu based virtual appliance on different hypervisors (e.g. -VMware, VirtualBox). It can be deployed on hardware running a number of different Linux-based operating systems.
The Stealthwatch Cloud Private Network Monitoring (PNM) Sensor is an extremely flexible piece of technology, capable of being utilized in a number of different deployment scenarios. It can be deployed as a complete Ubuntu based virtual appliance on different hypervisors (e.g. -VMware, VirtualBox). It can be deployed on hardware running a number of different Linux-based operating systems. Reference: https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2019/pdf/5eU6DfQV/LTRSEC-2240-LG2.pdf

Explanation
Each of the ASAs interfaces need to be grouped into one or more bridge groups. Each of these groups acts as an independent transparent firewall. It is not possible for one bridge group to communicate with another bridge group without assistance from an external router.
As of 8.4(1) upto 8 bridge groups are supported with 2-4 interface in each group. Prior to this only one bridge group was supported and only 2 interfaces.
Up to 4 interfaces are permitted per bridge-group (inside, outside, DMZ1, DMZ2)

A PAC file is a Proxy Auto-Configuration file that contains a JavaScript function that determines whether web browser requests go directly to the destination or are forwarded to a web proxy server. A PAC file allows the client desktop browsers to be configured to select when to connect direct or when to use the proxy based on the URL and the host name. A PAC file can be downloaded from a web server or a local file. A PAC file is more suitable for complex proxy configurations or multiple proxy servers12 A transparent mode is a proxy configuration where the client browsers do not need to be configured to use the proxy. The proxy intercepts the traffic and forwards it to the destination. A transparent mode does not allow the client browsers to select when to connect direct or when to use the proxy34 A forward file is not a valid proxy configuration method.
A bridge mode is a network configuration where a device connects two or more network segments and forwards traffic between them. A bridge mode is not a proxy configuration method5 References := 1: Proxy Auto-Configuration (PAC) file - HTTP | MDN 2: Proxy auto-config - Wikipedia 3: Explicit and Transparent Proxy - techdocs.broadcom.com 4: Configure Explicit Proxy - Palo Alto Networks | TechDocs 5: config web-proxy explicit | FortiGate / FortiOS 7.4.0