Update README.md

packages/session-replay-browser/README.md

@@ -75,7 +75,7 @@ sessionReplay.shutdown()
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 |`deviceId`|`string`|Yes|`undefined`|Sets an identifier for the device running your application.|
 |`sessionId`|`number`|Yes|`undefined`|Sets an identifier for the users current session. The value must be in milliseconds since epoch (Unix Timestamp).|
-|`sampleRate`|`number`|No|`undefined`|Use this option to control how many sessions will be selected for replay collection. A selected session will be collected for replay, while sessions that are not selected will not.  <br></br>The number should be a decimal between 0 and 1, ie `0.4`, representing the fraction of sessions you would like to have randomly selected for replay collection. Over a large number of sessions, `0.4` would select `40%` of those sessions.|
+|`sampleRate`|`number`|No|`0`|Use this option to control how many sessions will be selected for replay collection. A selected session will be collected for replay, while sessions that are not selected will not.  <br></br>The number should be a decimal between 0 and 1, ie `0.4`, representing the fraction of sessions you would like to have randomly selected for replay collection. Over a large number of sessions, `0.4` would select `40%` of those sessions.|
 |`optOut`|`boolean`|No|`false`|Sets permission to collect replays for sessions. Setting a value of true prevents Amplitude from collecting session replays.|
 |`flushMaxRetries`|`number`|No|`5`|Sets the maximum number of retries for failed upload attempts. This is only applicable to retryable errors.|
 |`logLevel`|`number`|No|`LogLevel.Warn`|`LogLevel.None` or `LogLevel.Error` or `LogLevel.Warn` or `LogLevel.Verbose` or `LogLevel.Debug`. Sets the log level.|