--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -6385,70 +6385,70 @@
     "expires_in_version": "never",
     "kind": "exponential",
     "high": 10000,
     "n_buckets": 1000,
     "description": "The time (in milliseconds) that it took a 'reconfigure thread' request to go round trip."
   },
   "MEDIA_RUST_MP4PARSE_SUCCESS": {
     "alert_emails": ["giles@mozilla.com", "kinetik@flim.org"],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "boolean",
     "bug_numbers": [1220885],
     "description": "(Bug 1220885) Whether the rust mp4 demuxer successfully parsed a stream segment.",
     "cpp_guard": "MOZ_RUST_MP4PARSE"
   },
   "MEDIA_RUST_MP4PARSE_ERROR_CODE": {
     "alert_emails": ["giles@mozilla.com", "kinetik@flim.org"],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "enumerated",
     "n_values": 32,
     "bug_numbers": [1238420],
-    "description": "The error code reported when an MP4 parse attempt has failed.",
+    "description": "The error code reported when an MP4 parse attempt has failed.0 = OK, 1 = bad argument, 2 = invalid data, 3 = unsupported, 4 = unexpected end of file, 5 = read error.",
     "cpp_guard": "MOZ_RUST_MP4PARSE"
   },
   "MEDIA_RUST_MP4PARSE_TRACK_MATCH_AUDIO": {
     "alert_emails": ["giles@mozilla.com", "kinetik@flim.org"],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "boolean",
     "bug_numbers": [1231169],
     "description": "Whether rust and stagefight mp4 parser audio track results match.",
     "cpp_guard": "MOZ_RUST_MP4PARSE"
   },
   "MEDIA_RUST_MP4PARSE_TRACK_MATCH_VIDEO": {
     "alert_emails": ["giles@mozilla.com", "kinetik@flim.org"],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "boolean",
     "bug_numbers": [1231169],
     "description": "Whether rust and stagefight mp4 parser video track results match.",
     "cpp_guard": "MOZ_RUST_MP4PARSE"
   },
   "MEDIA_WMF_DECODE_ERROR": {
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "enumerated",
     "n_values": 256,
     "description": "WMF media decoder error or success (0) codes."
   },
   "MEDIA_OGG_LOADED_IS_CHAINED": {
     "alert_emails": ["cpearce@mozilla.com"],
     "expires_in_version": "53",
     "kind": "boolean",
     "description": "Whether Ogg audio/video encountered are chained or not.",
     "bug_numbers": [1230295]
   },
   "MEDIA_HLS_CANPLAY_REQUESTED": {
     "alert_emails": ["ajones@mozilla.com", "giles@mozilla.com"],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "boolean",
     "description": "Reports a true value when a page requests canPlayType for an HTTP Live Streaming media type (or generic m3u playlist).",
     "bug_numbers": [1262659]
   },
   "MEDIA_HLS_DECODER_SUCCESS": {
     "alert_emails": ["ajones@mozilla.com", "giles@mozilla.com"],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "boolean",
     "description": "Reports whether a decoder for an HTTP Live Streaming media type was created when requested.",
     "bug_numbers": [1262659]
 
   },
   "VIDEO_MFT_OUTPUT_NULL_SAMPLES": {
     "alert_emails": ["cpearce@mozilla.com"],
     "expires_in_version": "53",
@@ -6492,35 +6492,35 @@
   },
   "VIDEO_CANPLAYTYPE_H264_PROFILE": {
     "expires_in_version": "50",
     "kind": "enumerated",
     "n_values": 244,
     "description": "The H.264 profile number (profile_idc) as extracted from the codecs parameter passed to HTMLMediaElement.canPlayType."
   },
   "VIDEO_DECODED_H264_SPS_CONSTRAINT_SET_FLAG": {
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "enumerated",
     "n_values": 128,
     "description": "A bit pattern to collect H.264 constraint set flag from the decoded SPS. Bits 0 through 5 represent constraint_set0_flag through constraint_set5_flag, respectively."
   },
   "VIDEO_DECODED_H264_SPS_LEVEL": {
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "enumerated",
     "n_values": 51,
     "description": "The H.264 level (level_idc) as extracted from the decoded SPS, from levels 1 (10) to 5.2 (51), with the addition of 0 for unknown values."
   },
   "VIDEO_DECODED_H264_SPS_PROFILE": {
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "enumerated",
     "n_values": 244,
     "description": "The H.264 profile number (profile_idc) as extracted from the decoded SPS."
   },
   "VIDEO_H264_SPS_MAX_NUM_REF_FRAMES": {
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "enumerated",
     "n_values": 17,
     "description": "SPS.max_num_ref_frames indicates how deep the H.264 queue is going to be, and as such the minimum memory usage by the decoder, from 0 to 16. 17 indicates an invalid value."
   },
   "WEBRTC_ICE_FINAL_CONNECTION_STATE": {
     "alert_emails": ["webrtc-ice-telemetry-alerts@mozilla.com"],
     "expires_in_version": "53",
     "kind": "enumerated",
@@ -9190,17 +9190,17 @@
     "expires_in_version": "50",
     "kind": "enumerated",
     "n_values" : 4,
     "description": "OpenH264 GMP files missing (0=none, or sum of: 1=library, 2=info)",
     "releaseChannelCollection": "opt-out"
   },
   "VIDEO_VP9_BENCHMARK_FPS": {
     "alert_emails": ["ajones@mozilla.com"],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "bug_numbers": [1230265],
     "kind": "linear",
     "high": 1000,
     "n_buckets": 100,
     "description": "720p VP9 decode benchmark measurement in frames per second",
     "releaseChannelCollection": "opt-out"
   },
   "MEDIA_CODEC_USED": {
@@ -10299,26 +10299,26 @@
     "expires_in_version": "50",
     "kind": "enumerated",
     "n_values": 10,
     "releaseChannelCollection": "opt-out",
     "description": "Reason for reporting the Adobe CDM to be unsupported. (1 = NOT_WINDOWS; 2 = WINDOWS_VERSION)"
   },
   "VIDEO_EME_REQUEST_SUCCESS_LATENCY_MS": {
     "alert_emails": ["cpearce@mozilla.com"],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "exponential",
     "high": 60000,
     "n_buckets": 60,
     "releaseChannelCollection": "opt-out",
     "description": "Time spent waiting for a navigator.requestMediaKeySystemAccess call to succeed."
   },
   "VIDEO_EME_REQUEST_FAILURE_LATENCY_MS": {
     "alert_emails": ["cpearce@mozilla.com"],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "exponential",
     "high": 60000,
     "n_buckets": 60,
     "releaseChannelCollection": "opt-out",
     "description": "Time spent waiting for a navigator.requestMediaKeySystemAccess call to fail."
   },
   "FXA_CONFIGURED": {
     "alert_emails": ["fx-team@mozilla.com"],