Add opt-out-of-FLoC headers by default

roles/matrix-nginx-proxy/defaults/main.yml

@@ -239,6 +239,16 @@ matrix_nginx_proxy_proxy_event_additional_configuration_blocks: []
 # A list of strings containing additional configuration blocks to add to the nginx http's server configuration (nginx-http.conf).
 matrix_nginx_proxy_proxy_http_additional_server_configuration_blocks: []
 
+# Controls whether to send a "Permissions-Policy interest-cohort=();" header along with all responses for all vhosts meant to be accessed by users.
+#
+# Learn more about what it is here:
+# - https://www.eff.org/deeplinks/2021/03/googles-floc-terrible-idea
+# - https://paramdeo.com/blog/opting-your-website-out-of-googles-floc-network
+# - https://amifloced.org/
+#
+# Of course, a better solution is to just stop using browsers (like Chrome), which participate in such tracking practices.
+matrix_nginx_proxy_floc_optout_enabled: true
+
 # A list of strings containing additional configuration blocks to add to the base matrix server configuration (matrix-domain.conf).
 matrix_nginx_proxy_proxy_matrix_additional_server_configuration_blocks: []
 

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-base-domain.conf.j2

@@ -5,6 +5,11 @@
 
 	gzip on;
 	gzip_types text/plain application/json;
+
+	{% if matrix_nginx_proxy_floc_optout_enabled %}
+		add_header Permissions-Policy interest-cohort=() always;
+	{% endif %}
+
 	{% for configuration_block in matrix_nginx_proxy_proxy_domain_additional_server_configuration_blocks %}
 		{{- configuration_block }}
 	{% endfor %}

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-bot-go-neb.conf.j2

@@ -3,8 +3,10 @@
 {% macro render_vhost_directives() %}
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
+
 	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
 	add_header X-Content-Type-Options nosniff;
+
 {% for configuration_block in matrix_nginx_proxy_proxy_bot_go_neb_additional_server_configuration_blocks %}
 	{{- configuration_block }}
 {% endfor %}

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-client-element.conf.j2

@@ -3,9 +3,14 @@
 {% macro render_vhost_directives() %}
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
+
 	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
 	add_header X-Content-Type-Options nosniff;
 	add_header X-Frame-Options SAMEORIGIN;
+	{% if matrix_nginx_proxy_floc_optout_enabled %}
+		add_header Permissions-Policy interest-cohort=() always;
+	{% endif %}
+
 	{% for configuration_block in matrix_nginx_proxy_proxy_element_additional_server_configuration_blocks %}
 		{{- configuration_block }}
 	{% endfor %}

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-dimension.conf.j2

@@ -3,8 +3,13 @@
 {% macro render_vhost_directives() %}
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
+
 	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
 	add_header X-Content-Type-Options nosniff;
+	{% if matrix_nginx_proxy_floc_optout_enabled %}
+		add_header Permissions-Policy interest-cohort=() always;
+	{% endif %}
+
 {% for configuration_block in matrix_nginx_proxy_proxy_dimension_additional_server_configuration_blocks %}
 	{{- configuration_block }}
 {% endfor %}

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-domain.conf.j2

@@ -17,6 +17,10 @@
 	gzip on;
 	gzip_types text/plain application/json;
 
+	{% if matrix_nginx_proxy_floc_optout_enabled %}
+		add_header Permissions-Policy interest-cohort=() always;
+	{% endif %}
+
 	location /.well-known/matrix {
 		root {{ matrix_static_files_base_path }};
 		{#

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-grafana.conf.j2

@@ -3,13 +3,19 @@
 {% macro render_vhost_directives() %}
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
+
 	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
 	# duplicate X-Content-Type-Options & X-Frame-Options header
 	# Enabled by grafana by default
 	# add_header X-Content-Type-Options nosniff;
 	# add_header X-Frame-Options SAMEORIGIN;
 	add_header Referrer-Policy "strict-origin-when-cross-origin";
+	{% if matrix_nginx_proxy_floc_optout_enabled %}
+		add_header Permissions-Policy interest-cohort=() always;
+	{% endif %}
+
 	proxy_cookie_path / "/; HTTPOnly; Secure";
+
 	{% for configuration_block in matrix_nginx_proxy_proxy_grafana_additional_server_configuration_blocks %}
 		{{- configuration_block }}
 	{% endfor %}

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-jitsi.conf.j2

@@ -3,8 +3,13 @@
 {% macro render_vhost_directives() %}
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
+
 	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
 	add_header X-Content-Type-Options nosniff;
+	{% if matrix_nginx_proxy_floc_optout_enabled %}
+		add_header Permissions-Policy interest-cohort=() always;
+	{% endif %}
+
 {% for configuration_block in matrix_nginx_proxy_proxy_jitsi_additional_server_configuration_blocks %}
 	{{- configuration_block }}
 {% endfor %}

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-riot-web.conf.j2

@@ -1,6 +1,10 @@
 #jinja2: lstrip_blocks: "True"
 
 {% macro render_vhost_directives() %}
+	{% if matrix_nginx_proxy_floc_optout_enabled %}
+		add_header Permissions-Policy interest-cohort=() always;
+	{% endif %}
+
 	{% for configuration_block in matrix_nginx_proxy_proxy_riot_additional_server_configuration_blocks %}
 		{{- configuration_block }}
 	{% endfor %}

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-sygnal.conf.j2

@@ -3,9 +3,11 @@
 {% macro render_vhost_directives() %}
 	gzip on;
 	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
+
 	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
 	add_header X-Content-Type-Options nosniff;
 	add_header X-Frame-Options DENY;
+
 {% for configuration_block in matrix_nginx_proxy_proxy_sygnal_additional_server_configuration_blocks %}
 	{{- configuration_block }}
 {% endfor %}