diff --git a/setup/env-variables/backend-envs-chain-specific.mdx b/setup/env-variables/backend-envs-chain-specific.mdx
index 89b2b2bd..8bd80729 100644
--- a/setup/env-variables/backend-envs-chain-specific.mdx
+++ b/setup/env-variables/backend-envs-chain-specific.mdx
@@ -245,6 +245,8 @@ Supported together with setting `CHAIN_TYPE=arbitrum`
 | `INDEXER_ARBITRUM_MISSED_MESSAGES_RECHECK_INTERVAL`                | Interval to re-check on the rollup historical messages directed to and from the rollup, in seconds. Implemented in [#9312](https://github.com/blockscout/blockscout/pull/9312).                                                                                                                                                                                                                                | Version: v6.7.0+ <br />Default: `3600` <br />Applications: Indexer                                       |
 | `INDEXER_ARBITRUM_MISSED_MESSAGES_BLOCKS_DEPTH`                    | Amount of L2 blocks to revisit to identify historical cross-chain messages in the messages catchup task. Implemented in [#10374](https://github.com/blockscout/blockscout/pull/10374).                                                                                                                                                                                                                         | Version: v6.8.0+ <br />Default: `10000` <br />Applications: Indexer                                      |
 | `INDEXER_ARBITRUM_TRACKING_MESSAGES_ON_L1_RECHECK_INTERVAL`        | Interval to re-check on L1 new messages directed to the rollup, in seconds. Implemented in [#9312](https://github.com/blockscout/blockscout/pull/9312).                                                                                                                                                                                                                                                        | Version: v6.7.0+ <br />Default: `20` <br />Applications: Indexer                                         |
+| `INDEXER_ARBITRUM_MESSAGES_TRACKING_FAILURE_THRESHOLD`             | The time threshold for L1 message tracking tasks. If a task has not run successfully within this threshold, it is marked as failed and enters a cooldown period before retrying. Implemented in [#13792](https://github.com/blockscout/blockscout/pull/13792).                                                                                                                                                 | Version: master <br />Default: `10m` <br />Applications: Indexer                                      |
+| `INDEXER_ARBITRUM_MISSED_MESSAGE_IDS_RANGE`                        | Size of each message ID range inspected when discovering L1-to-L2 messages with missing L1 origination information. Implemented in [#13792](https://github.com/blockscout/blockscout/pull/13792).                                                                                                                                                                                                              | Version: master <br />Default: `10000` <br />Applications: Indexer                                      |
 | `INDEXER_ARBITRUM_BATCHES_TRACKING_ENABLED`                        | Enables monitoring of transaction batches, block confirmations, and L2-to-L1 messages executions. Implemented in [#9312](https://github.com/blockscout/blockscout/pull/9312).                                                                                                                                                                                                                                  | Version: v6.7.0+ <br />Default: (empty) <br />Applications: Indexer                                      |
 | `INDEXER_ARBITRUM_BATCHES_TRACKING_RECHECK_INTERVAL`               | Interval to re-check on L1 new and historical batches, confirmations, and executions, in seconds. Implemented in [#9312](https://github.com/blockscout/blockscout/pull/9312).                                                                                                                                                                                                                                  | Version: v6.7.0+ <br />Default: `20` <br />Applications: Indexer                                         |
 | `INDEXER_ARBITRUM_BATCHES_TRACKING_L1_FINALIZATION_CHECK_ENABLED`  | Whether L1 transactions related to batches, confirmations, and executions need to be monitored for finalization or not. Implemented in [#9312](https://github.com/blockscout/blockscout/pull/9312).                                                                                                                                                                                                            | Version: v6.7.0+ <br />Default: `false` <br />Applications: Indexer                                      |