![image]() Beginning on 1/23/24 the sync success rates for the clients and tabs engines on Firefox Desktop beta began to decline (see [here](https://sql.telemetry.mozilla.org/queries/85526?p_Days=60&p_channel=beta&p_engine_name=all-engines#211801) for details). There was also a drop in the clients engine sync success rate on Nightly starting 1/13/24 which _*may*_ be related (see [here](https://sql.telemetry.mozilla.org/queries/85526?p_Days=60&p_channel=nightly&p_engine_name=all-engines#211801)). The tabs engine success rate on Nightly is also decreasing, but much more gradually. Checking the [Desktop Sync Error Message graph](https://sql.telemetry.mozilla.org/queries/86456?p_channel=beta&p_engine_name=all-engines#214076) there is an increase in remote setup failure and UTF-8 errors for both the tabs and clients engines around the same time period.
Bug 1877548 Comment 0 Edit History
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 Beginning on 1/23/24 the sync success rates for the clients and tabs engines on Firefox Desktop beta began to decline (see [here](https://sql.telemetry.mozilla.org/queries/85526?p_Days=60&p_channel=beta&p_engine_name=all-engines#211801) for details). There was also a drop in the clients engine sync success rate on Nightly starting 1/13/24 which _*may*_ be related (see [here](https://sql.telemetry.mozilla.org/queries/85526?p_Days=60&p_channel=nightly&p_engine_name=all-engines#211801)). The tabs engine success rate on Nightly is also decreasing, but much more gradually. Checking the [Desktop Sync Error Message graph](https://sql.telemetry.mozilla.org/queries/86456?p_channel=beta&p_engine_name=all-engines#214076) there is an increase in remote setup failure and UTF-8 errors for both the tabs and clients engines around the same time period.
Beginning on 1/23/24 the sync success rates for the clients and tabs engines on Firefox Desktop beta began to decline (see [here](https://sql.telemetry.mozilla.org/queries/85526?p_Days=60&p_channel=beta&p_engine_name=all-engines#211801) for details). There was also a drop in the clients engine sync success rate on Nightly starting 1/13/24 which _*may*_ be related (see [here](https://sql.telemetry.mozilla.org/queries/85526?p_Days=60&p_channel=nightly&p_engine_name=all-engines#211801)). The tabs engine success rate on Nightly is also decreasing, but much more gradually. Checking the [Desktop Sync Error Message graph](https://sql.telemetry.mozilla.org/queries/86456?p_channel=beta&p_engine_name=all-engines#214076) there is an increase in remote setup failure and UTF-8 errors for both the tabs and clients engines around the same time period.