--- a/.gecko_rev.yml
+++ b/.gecko_rev.yml
@@ -1,11 +1,11 @@
 ---
 GECKO_BASE_REPOSITORY: https://hg.mozilla.org/mozilla-unified
-GECKO_HEAD_REPOSITORY: https://hg.mozilla.org/mozilla-central
+GECKO_HEAD_REPOSITORY: https://hg.mozilla.org/releases/mozilla-beta
 GECKO_HEAD_REF: default
 
 ### For comm-central
 # GECKO_BASE_REPOSITORY: https://hg.mozilla.org/mozilla-unified
 # GECKO_HEAD_REPOSITORY: https://hg.mozilla.org/mozilla-central
 # GECKO_HEAD_REF: default
 #
 ### For branches

--- a/mail/config/mozconfigs/l10n-common
+++ b/mail/config/mozconfigs/l10n-common
@@ -1,12 +1,13 @@
 . "$topsrcdir/comm/mail/config/mozconfigs/common"
 
 ac_add_options --enable-update-channel="${MOZ_UPDATE_CHANNEL}"
 ac_add_options --with-l10n-base=../../l10n
+ac_add_options --enable-official-branding
 ac_add_options --disable-nodejs
 . "$topsrcdir/build/mozconfig.no-compile"
 
 # Needed to enable breakpad in application.ini
 export MOZILLA_OFFICIAL=1
 
 # Disable enforcing that add-ons are signed by the trusted root
 MOZ_REQUIRE_ADDON_SIGNING=0

--- a/mail/config/mozconfigs/linux32/nightly
+++ b/mail/config/mozconfigs/linux32/nightly
@@ -1,14 +1,13 @@
 . "$topsrcdir/build/unix/mozconfig.linux32"
 . "$topsrcdir/build/mozconfig.stylo"
 . "$topsrcdir/comm/mail/config/mozconfigs/common"
 
 ac_add_options --enable-update-channel="${MOZ_UPDATE_CHANNEL}"
-ac_add_options --enable-profiling
 
 # Needed to enable breakpad in application.ini
 export MOZILLA_OFFICIAL=1
 
 export MOZ_TELEMETRY_REPORTING=1
 
 # For NSS symbols
 export MOZ_DEBUG_SYMBOLS=1

--- a/mail/config/mozconfigs/linux64/nightly
+++ b/mail/config/mozconfigs/linux64/nightly
@@ -1,14 +1,13 @@
 . "$topsrcdir/build/unix/mozconfig.linux"
 . "$topsrcdir/build/mozconfig.stylo"
 . "$topsrcdir/comm/mail/config/mozconfigs/common"
 
 ac_add_options --enable-update-channel="${MOZ_UPDATE_CHANNEL}"
-ac_add_options --enable-profiling
 
 # Needed to enable breakpad in application.ini
 export MOZILLA_OFFICIAL=1
 
 export MOZ_TELEMETRY_REPORTING=1
 
 # For NSS symbols
 export MOZ_DEBUG_SYMBOLS=1

--- a/mail/config/mozconfigs/macosx64/nightly
+++ b/mail/config/mozconfigs/macosx64/nightly
@@ -1,15 +1,14 @@
 . "$topsrcdir/build/macosx/mozconfig.common"
 . "$topsrcdir/build/mozconfig.stylo"
 . "$topsrcdir/comm/mail/config/mozconfigs/common"
 
 ac_add_options --enable-update-channel="${MOZ_UPDATE_CHANNEL}"
 ac_add_options --disable-install-strip
-ac_add_options --enable-profiling
 
 # For NSS symbols
 export MOZ_DEBUG_SYMBOLS=1
 
 # Needed to enable breakpad in application.ini
 export MOZILLA_OFFICIAL=1
 
 export MOZ_TELEMETRY_REPORTING=1

--- a/mail/config/mozconfigs/win32/nightly
+++ b/mail/config/mozconfigs/win32/nightly
@@ -1,16 +1,15 @@
 . "$topsrcdir/build/mozconfig.win-common"
 . "$topsrcdir/build/mozconfig.common"
 . "$topsrcdir/build/mozconfig.stylo"
 . "$topsrcdir/comm/mail/config/mozconfigs/common"
 
 ac_add_options --enable-update-channel="${MOZ_UPDATE_CHANNEL}"
 ac_add_options --enable-jemalloc
-ac_add_options --enable-profiling
 
 # For NSS symbols
 export MOZ_DEBUG_SYMBOLS=1
 
 export MOZ_TELEMETRY_REPORTING=1
 
 # Needed to enable breakpad in application.ini
 export MOZILLA_OFFICIAL=1

--- a/mail/config/mozconfigs/win64/nightly
+++ b/mail/config/mozconfigs/win64/nightly
@@ -1,17 +1,16 @@
 . "$topsrcdir/build/mozconfig.win-common"
 . "$topsrcdir/build/mozconfig.common"
 . "$topsrcdir/build/mozconfig.stylo"
 . "$topsrcdir/comm/mail/config/mozconfigs/common"
 . "$topsrcdir/comm/mail/config/mozconfigs/win64/common-win64"
 
 ac_add_options --enable-update-channel="${MOZ_UPDATE_CHANNEL}"
 ac_add_options --enable-jemalloc
-ac_add_options --enable-profiling
 
 # Needed to enable breakpad in application.ini
 export MOZILLA_OFFICIAL=1
 
 export MOZ_TELEMETRY_REPORTING=1
 
 # Disable enforcing that add-ons are signed by the trusted root
 MOZ_REQUIRE_ADDON_SIGNING=0

--- a/mail/config/version.txt
+++ b/mail/config/version.txt
@@ -1,1 +1,1 @@
-68.0a1
+68.0

--- a/mail/config/version_display.txt
+++ b/mail/config/version_display.txt
@@ -1,1 +1,1 @@
-68.0a1
+68.0b1

old mode 100755
new mode 100644
--- a/mail/confvars.sh
+++ b/mail/confvars.sh
@@ -17,19 +17,19 @@ BROWSER_CHROME_URL=chrome://messenger/co
 
 MOZ_BRANDING_DIRECTORY=$commreltopsrcdir/mail/branding/nightly
 MOZ_OFFICIAL_BRANDING_DIRECTORY=$commreltopsrcdir/mail/branding/thunderbird
 
 MOZ_APP_ID={3550f703-e582-4d05-9a08-453d09bdfdc6}
 # This should usually be the same as the value MAR_CHANNEL_ID.
 # If more than one ID is needed, then you should use a comma separated list
 # of values.
-ACCEPTED_MAR_CHANNEL_IDS=thunderbird-comm-central
+ACCEPTED_MAR_CHANNEL_IDS=thunderbird-comm-beta,thunderbird-comm-release
 # The MAR_CHANNEL_ID must not contain the following 3 characters: ",\t "
-MAR_CHANNEL_ID=thunderbird-comm-central
+MAR_CHANNEL_ID=thunderbird-comm-beta
 MOZ_PROFILE_MIGRATOR=1
 MOZ_BINARY_EXTENSIONS=1
 MOZ_SEPARATE_MANIFEST_FOR_THEME_OVERRIDES=1
 
 # Enable building ./signmar and running libmar signature tests
 MOZ_ENABLE_SIGNMAR=1
 
 MOZ_DEVTOOLS=all

--- a/mail/locales/shipped-locales
+++ b/mail/locales/shipped-locales
@@ -1,1 +1,59 @@
+ar
+ast
+be
+bg
+br
+ca
+cs
+cy
+da
+de
+dsb
+el
+en-GB
 en-US
+es-AR
+es-ES
+et
+eu
+fi
+fr
+fy-NL
+ga-IE
+gd
+gl
+he
+hr
+hsb
+hu
+hy-AM
+id
+is
+it
+ja linux win32
+ja-JP-mac osx
+kab
+kk
+ko
+lt
+ms
+nb-NO
+nl
+nn-NO
+pl
+pt-BR
+pt-PT
+rm
+ro
+ru
+si
+sk
+sl
+sq
+sr
+sv-SE
+tr
+uk
+vi
+zh-CN
+zh-TW

old mode 100755
new mode 100644
--- a/mail/test/mozmill/runtest.py
+++ b/mail/test/mozmill/runtest.py
@@ -96,17 +96,17 @@ class ThunderTestProfile(mozprofile.Thun
         # disable the first use junk dialog
         'mailnews.ui.junk.firstuse': False,
         # set the relative dirs properly
         'mail.root.none-rel': "[ProfD]Mail",
         'mail.root.pop3-rel': "[ProfD]Mail",
         # Do not allow check new mail to be set
         'mail.startup.enabledMailCheckOnce': True,
         # Disable compatibility checking
-        'extensions.checkCompatibility.nightly': False,
+        'extensions.checkCompatibility.68': False,
         # Stop any pings to AMO on add-on install
         'extensions.getAddons.cache.enabled': False,
         # In case a developer is working on a laptop without a network
         # connection, don't detect offline mode; hence we'll still startup
         # online which is what mozmill currently requires. It'll also protect us
         # from any random network failures.
         'offline.autoDetect': False,
         # Don't load what's new or the remote start page - keep everything local

--- a/suite/config/version.txt
+++ b/suite/config/version.txt
@@ -1,1 +1,1 @@
-2.65a1
+2.65