https://community.dynatrace.com/t5/Troubleshooting/Browser-monitors-Unable-to-block-specific-requests-owing-to/ta-p/233025 <H2>Summary</H2> <P>The length of regular expressions is limited in MV3, which is the latest iteration of the Chrome extension platform. (The Dynatrace Synthetic Recorder is a Google Chrome browser extension.) As a result, the length of URLs or match patterns you specify in browser monitor configuration to <STRONG>Block specific requests</STRONG> can't exceed 90 characters.</P> <P>&nbsp;</P> <H2>Resolution</H2> <P>If your current string exceeds 90 characters:</P> <UL> <LI>The <STRONG>Block specific requests</STRONG> setting is not applied and needs to be fixed to meet the 90-character limit.</LI> <LI>You won't be able to save specific changes to browser monitor configuration, such as adding a request or validation. You can, however, change the monitor name, frequency, outage handling, and thresholds. The <STRONG>Block specific requests</STRONG> setting needs to be fixed before you can save all changes.</LI> </UL> <P>Read more about this setting in <A title="Learn about configuring browser monitors and clickpaths." href="https://docs.dynatrace.com/docs/shortlink/browser-monitors-config#block-requests" target="_blank" rel="noopener">Configure browser monitors</A>.</P> <P>&nbsp;</P> <H2 id="toc-hId-1971787789">What's Next</H2> <P>If this article didn't help resolve the issue, open a chat and provide</P> <UL> <LI>a link to the browser monitor that you're troubleshooting.</LI> <LI>an explanation of the behavior you're seeing, and what you're expecting.&nbsp;</LI> <LI>the troubleshooting steps you have already completed.</LI> </UL> <P>You can find further troubleshooting tips for Synthetic in the&nbsp;<A class="" href="https://community.dynatrace.com/t5/Troubleshooting/Synthetic-Troubleshooting-Map/ta-p/250426" target="_blank" rel="noopener">Synthetic Troubleshooting Map</A></P> Tue, 18 Nov 2025 14:44:03 GMT nandini_balakri 2025-11-18T14:44:03Z https://community.dynatrace.com/t5/Troubleshooting/Browser-monitors-Unable-to-block-specific-requests-owing-to/ta-p/233025 <H2>Summary</H2> <P>The length of regular expressions is limited in MV3, which is the latest iteration of the Chrome extension platform. (The Dynatrace Synthetic Recorder is a Google Chrome browser extension.) As a result, the length of URLs or match patterns you specify in browser monitor configuration to <STRONG>Block specific requests</STRONG> can't exceed 90 characters.</P> <P>&nbsp;</P> <H2>Resolution</H2> <P>If your current string exceeds 90 characters:</P> <UL> <LI>The <STRONG>Block specific requests</STRONG> setting is not applied and needs to be fixed to meet the 90-character limit.</LI> <LI>You won't be able to save specific changes to browser monitor configuration, such as adding a request or validation. You can, however, change the monitor name, frequency, outage handling, and thresholds. The <STRONG>Block specific requests</STRONG> setting needs to be fixed before you can save all changes.</LI> </UL> <P>Read more about this setting in <A title="Learn about configuring browser monitors and clickpaths." href="https://docs.dynatrace.com/docs/shortlink/browser-monitors-config#block-requests" target="_blank" rel="noopener">Configure browser monitors</A>.</P> <P>&nbsp;</P> <H2 id="toc-hId-1971787789">What's Next</H2> <P>If this article didn't help resolve the issue, open a chat and provide</P> <UL> <LI>a link to the browser monitor that you're troubleshooting.</LI> <LI>an explanation of the behavior you're seeing, and what you're expecting.&nbsp;</LI> <LI>the troubleshooting steps you have already completed.</LI> </UL> <P>You can find further troubleshooting tips for Synthetic in the&nbsp;<A class="" href="https://community.dynatrace.com/t5/Troubleshooting/Synthetic-Troubleshooting-Map/ta-p/250426" target="_blank" rel="noopener">Synthetic Troubleshooting Map</A></P> Tue, 18 Nov 2025 14:44:03 GMT https://community.dynatrace.com/t5/Troubleshooting/Browser-monitors-Unable-to-block-specific-requests-owing-to/ta-p/233025 nandini_balakri 2025-11-18T14:44:03Z