Inject a HTML to HTML response with squid

[comeback1106]

HI everyone.
I have problem when inject HTML code to HTML response with squid. I have try this with squid on centos throught this tutorial. http://www.e-cap.org/Documentation.
This work with squid3+ libecap and ecap adapter. Every work smoothly. But when I try do this again with squid3 on pfsense, I see some problem here:
1/ I can't compile install package on pfsense. I see this on this doc. https://doc.pfsense.org/index.php/Can_I_compile_software_on_pfSense. So that I can't complie libecap on pfsense.
2/ Squid3 on pfsense don't enable ecap module. I can see when using this command:

[2.1.5-RELEASE][root@pfsense.localdomain]/root(5): squid -v
Squid Cache: Version 3.3.10
configure options:  '--with-default-user=squid' '--bindir=/usr/pbi/squid-i386/sbin' '--sbindir=/usr/pbi/squid-i386/sbin' '--datadir=/usr/pbi/squid-i386/etc/squid' '--libexecdir=/usr/pbi/squid-i386/libexec/squid' '--localstatedir=/var' '--sysconfdir=/usr/pbi/squid-i386/etc/squid' '--with-logdir=/var/log/squid' '--with-pidfile=/var/run/squid/squid.pid' '--with-swapdir=/var/squid/cache/squid' '--enable-auth' '--enable-build-info' '--enable-loadable-modules' '--enable-removal-policies=lru heap' '--disable-epoll' '--disable-linux-netfilter' '--disable-linux-tproxy' '--disable-translation' '--enable-auth-basic=DB MSNT MSNT-multi-domain NCSA PAM POP3 RADIUS  fake getpwnam LDAP NIS' '--enable-auth-digest=file' '--enable-external-acl-helpers=file_userip time_quota unix_group LDAP_group' '--enable-auth-negotiate=kerberos wrapper' '--enable-auth-ntlm=fake smb_lm' '--enable-storeio=diskd rock ufs aufs' '--enable-disk-io=AIO Blocking DiskDaemon IpcIo Mmapped DiskThreads' '--enable-log-daemon-helpers=file' '--enable-url-rewrite-helpers=fake' '--enable-delay-pools' '--enable-ssl' '--with-openssl=/usr' '--enable-ssl-crtd' '--enable-icmp' '--enable-htcp' '--disable-forw-via-db' '--enable-cache-digests' '--enable-wccp' '--enable-wccpv2' '--enable-eui' '--disable-ipfw-transparent' '--enable-pf-transparent' '--disable-ipf-transparent' '--enable-follow-x-forwarded-for' '--disable-ecap' '--enable-icap-client' '--disable-esi' '--enable-kqueue' '--with-large-files' '--prefix=/usr/pbi/squid-i386' '--mandir=/usr/pbi/squid-i386/man' '--infodir=/usr/pbi/squid-i386/info/' '--build=i386-portbld-freebsd8.3' 'build_alias=i386-portbld-freebsd8.3' 'CC=cc' 'CFLAGS=-O2 -pipe -I/usr/pbi/squid-i386/include -I/usr/include -DLDAP_DEPRECATED -fno-strict-aliasing' 'LDFLAGS= -L/usr/pbi/squid-i386/lib -pthread -Wl,-rpath=/usr/lib:/usr/pbi/squid-i386/lib -L/usr/lib' 'CPPFLAGS=' 'CXX=c++' 'CXXFLAGS=-O2 -pipe -I/usr/pbi/squid-i386/include -I/usr/include -DLDAP_DEPRECATED -fno-strict-aliasing' 'CPP=cpp' --enable-ltdl-convenience

And the question is:
Any solution help me can Inject html to HTML response with squid on pfsense.
Thanks alots for your support.