[revision] www/mozilla-firefox: Inform about H264 decoding in pkg-readme

Some web conferencing applications, like Webex or Jitsi-meet, require
H264 hardware decoding to work, but in Firefox, this feature is disabled
by default. To save others from going through the trouble of figuring
this out (particularly when the OpenH264 Video Codec plugin (under
about:addons -> Plugins), that supposedly "will be installed shortly",
can be quite misleading), I suggest adding the following to the
pkg-readme. sdk@ was very kind to help me figure this out.

[1] https://bugzilla.mozilla.org/show_bug.cgi?id=1717679

diff /usr/ports
path + /usr/ports
commit - c69c8333fd531f9987d5e116c0af876764be3704
blob - f5d1f06e728bb5a26889bbe6717bae0a9f6dbdac
file + www/firefox-esr/pkg/README
--- www/firefox-esr/pkg/README
+++ www/firefox-esr/pkg/README
@@ -122,6 +122,12 @@ device e.g.:
Screen sharing needs shmget() which isn't available when pledge() is active, so
you will have to disable pledge for the main process.

+Some web conferencing applications also require H264 hardware decoding, which
+by default is disabled in Firefox. To enable it, open about:config and set the
+following key to true:
+
+media.webrtc.hw.h264.enabled: true
+
KerberosV support
=================
To use Kerberized Firefox, first manually install the "heimdal" package
commit - c69c8333fd531f9987d5e116c0af876764be3704
blob - f5d1f06e728bb5a26889bbe6717bae0a9f6dbdac
file + www/mozilla-firefox/pkg/README
--- www/mozilla-firefox/pkg/README
+++ www/mozilla-firefox/pkg/README
@@ -122,6 +122,12 @@ device e.g.:
Screen sharing needs shmget() which isn't available when pledge() is active, so
you will have to disable pledge for the main process.

+Some web conferencing applications also require H264 hardware decoding, which
+by default is disabled in Firefox. To enable it, open about:config and set the
+following key to true:
+
+media.webrtc.hw.h264.enabled: true
+
KerberosV support
=================
To use Kerberized Firefox, first manually install the "heimdal" package