https://community.dynatrace.com/t5/Troubleshooting/Synthetic-Recorder-Extension-blocked-in-incognito-mode-when/ta-p/255791 <DIV> <H2><STRONG>Summary</STRONG></H2> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">This article explains how to troubleshoot and fix the issue where the Dynatrace Synthetic Recorder extension is blocked in Chrome or Microsoft Edge when using Incognito or InPrivate mode.</DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">This issue is typically caused by browser policies such as <CODE>ExtensionInstallForcelist</CODE>, which prevent the extension from running in Incognito mode.</DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">&nbsp;</DIV> </DIV> <P><LI-TOC indent="15" liststyle="disc" maxheadinglevel="2"></LI-TOC></P> <DIV class="lia-message-template-content-zone"> <P>&nbsp;</P> <DIV> <H2><STRONG>Problem</STRONG></H2> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">When attempting to record a Synthetic Browser monitor (new or existing), the recorder opens an Incognito or InPrivate window, but the extension fails to load.</DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">You may see an error such as:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">“This page has been blocked by Chrome”</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf"><CODE>ERR_BLOCKED_BY_CLIENT</CODE></LI> </UL> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">As a result:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Recording does not start</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">The page remains blocked indefinitely</LI> </UL> </DIV> <span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="ShahbazKhan_0-1726466368325.png" style="width: 748px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/22396iC9230A27DE07A865/image-dimensions/748x350?v=v2" width="748" height="350" role="button" title="ShahbazKhan_0-1726466368325.png" alt="ShahbazKhan_0-1726466368325.png" /></span> <P>Text from Image:</P> <DIV dir="ltr">pbnfcaobikkbealhienfilklacghhgoi is blocked</DIV> <DIV dir="ltr">This page has been blocked by Chrome</DIV> <DIV dir="ltr">ERR_BLOCKED_BY_CLIENT</DIV> <DIV dir="ltr">&nbsp;</DIV> <DIV> <H2><STRONG>Cause</STRONG></H2> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">This behavior occurs when:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">The Dynatrace Synthetic Recorder extension is <STRONG>force-installed via policy</STRONG></LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">The extension ID is configured in: <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf"><CODE>ExtensionInstallForcelist</CODE> in browser policies (e.g., Registry / Group Policy)<SPAN class="">Value <CODE>pbnfcaobikkbealhienfilklacghhgoi; <A href="https://clients2.google.com/service/update2/crx" rel="noopener" target="_blank">https://clients2.google.com/service/update2/crx</A></CODE></SPAN></LI> </UL> </LI> </UL> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">This restriction specifically impacts:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Incognito (Chrome)</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">InPrivate (Edge)</LI> </UL> </DIV> <span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="ShahbazKhan_1-1726466689228.png" style="width: 656px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/22397i196B8E4E8A400B7C/image-dimensions/656x341?v=v2" width="656" height="341" role="button" title="ShahbazKhan_1-1726466689228.png" alt="ShahbazKhan_1-1726466689228.png" /></span> <P>&nbsp;</P> <DIV> <H3><STRONG>Option 1 – Update browser policy (recommended)</STRONG></H3> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">If using <CODE>ExtensionInstallForcelist</CODE>, ensure developer tools are allowed.</DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Set the following policy:</DIV> <PRE><CODE>HKLM\Software\Policies\Google\Chrome\ DeveloperToolsAvailability = 1 </CODE></PRE> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">This enables the extension to function correctly in Incognito mode.</DIV> </DIV> <span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="ShahbazKhan_2-1726466904417.png" style="width: 674px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/22398i1120B119C952FE5D/image-dimensions/674x433?v=v2" width="674" height="433" role="button" title="ShahbazKhan_2-1726466904417.png" alt="ShahbazKhan_2-1726466904417.png" /></span> <P>&nbsp;</P> <DIV> <H3><STRONG>Option 2 – Disable Incognito for recording (workaround)</STRONG></H3> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">If policies cannot be changed, you can avoid Incognito mode entirely.</DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol"><span class="lia-unicode-emoji" title=":backhand_index_pointing_right:">👉</span> See: <A class="fui-Link ___w5et180 f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv f1mo0ibp fjoy568 ff5ikls f1s184ao f1mk8lai fnbmjn9 f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a" tabindex="0" href="https://community.dynatrace.com/t5/Troubleshooting/How-to-record-or-playback-a-Browser-Monitor-without-Incognito/ta-p/237655" rel="noopener noreferrer" data-tabster="{&quot;restorer&quot;:{&quot;type&quot;:1}}" target="_blank">How to record without Incognito</A></DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Key points:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">The Synthetic Recorder uses Incognito for a clean session</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Disabling it allows recording without policy restrictions</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">This only affects <STRONG>local recording</STRONG>, not monitor execution</LI> </UL> <P>&nbsp;</P> <DIV> <H2><STRONG>When to Use This Fix</STRONG></H2> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Apply this solution if:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Your organization enforces browser extensions via Group Policy</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Incognito mode is restricted or controlled</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">The Synthetic Recorder extension appears blocked in Chrome or Edge</LI> </UL> <H2>&nbsp;</H2> <H2><STRONG>Best Practices</STRONG></H2> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf"><span class="lia-unicode-emoji" title=":white_heavy_check_mark:">✅</span> Validate browser policies before installing the extension</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf"><span class="lia-unicode-emoji" title=":white_heavy_check_mark:">✅</span> Avoid forcing extensions unless necessary</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf"><span class="lia-unicode-emoji" title=":white_heavy_check_mark:">✅</span> Provide exceptions for DeveloperToolsAvailability where required</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf"><span class="lia-unicode-emoji" title=":white_heavy_check_mark:">✅</span> Test recording both with and without Incognito</LI> </UL> <H2>&nbsp;</H2> <H2><STRONG>What’s Next</STRONG></H2> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">If the issue persists:</DIV> <OL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Confirm browser policy settings (Chrome/Edge)</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Verify extension installation method</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Test recording without Incognito</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Collect error screenshots and browser logs</LI> </OL> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Then open a Dynatrace support chat with:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Policy configuration details</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Extension setup method</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Exact error message</LI> </UL> </DIV> <P>&nbsp;</P> </DIV> <H3>Related reading</H3> <P><span class="lia-unicode-emoji" title=":open_book:">📖</span>&nbsp;&nbsp;<A class="fui-Link ___w5et180 f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv f1mo0ibp fjoy568 ff5ikls f1s184ao f1mk8lai fnbmjn9 f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a" tabindex="0" href="https://community.dynatrace.com/t5/Troubleshooting/How-to-record-or-playback-a-Browser-Monitor-without-Incognito/ta-p/237655" target="_self" rel="noreferrer" data-tabster="{&quot;restorer&quot;:{&quot;type&quot;:1}}">How to record or playback a Browser Monitor without Incognito mode</A>&nbsp;&nbsp;</P> <P><span class="lia-unicode-emoji" title=":open_book:">📖</span>&nbsp;&nbsp;<A class="" title="https://chromeenterprise.google/policies/#DeveloperToolsAvailability" href="https://chromeenterprise.google/policies/#DeveloperToolsAvailability" rel="noopener" target="_blank">DeveloperToolsAvailability</A></P> <P><span class="lia-unicode-emoji" title=":open_book:">📖</span>&nbsp;&nbsp;<A class="" title="https://chromeenterprise.google/policies/#ExtensionInstallForcelist" href="https://chromeenterprise.google/policies/#ExtensionInstallForcelist" rel="noopener" target="_blank">ExtensionInstallForcelist</A></P> </DIV> Fri, 12 Jun 2026 08:19:59 GMT ShahbazKhan 2026-06-12T08:19:59Z https://community.dynatrace.com/t5/Troubleshooting/Synthetic-Recorder-Extension-blocked-in-incognito-mode-when/ta-p/255791 <P><LI-TOC indent="15" liststyle="disc" maxheadinglevel="2"></LI-TOC></P> <DIV class="lia-message-template-content-zone"> <P>*<EM>Use a table of contents for longer articles.&nbsp;</EM></P> <H1>Summary</H1> <P><EM>*This is a mandatory section.</EM></P> <P><EM>Short description of which part of the Dynatrace platform the article refers to and what kind of problem it will help resolve / task it will describe.</EM></P> <P>&nbsp;</P> <H1>Problem</H1> <P><EM>*This is a mandatory section.</EM></P> <P><EM>Provide a precise description of the problem / task to be described.</EM></P> <P>&nbsp;</P> <H1>Troubleshooting steps</H1> <P><EM>*This section can be omitted.</EM></P> <P>&nbsp;</P> <H1>Resolution</H1> <P><EM>*This section can be omitted for ticket‑creation articles.</EM></P> <H1>What's next</H1> <P><EM>*This is a mandatory section.</EM></P> </DIV> Fri, 12 Jun 2026 08:19:59 GMT https://community.dynatrace.com/t5/Troubleshooting/Synthetic-Recorder-Extension-blocked-in-incognito-mode-when/ta-p/255791 ShahbazKhan 2026-06-12T08:19:59Z https://community.dynatrace.com/t5/Troubleshooting/Synthetic-Recorder-Extension-blocked-in-incognito-mode-when/tac-p/256996#M738 <P>What causes the extension to be added to this registry list?&nbsp; Some anti-malware software?</P> Tue, 24 Sep 2024 15:25:04 GMT https://community.dynatrace.com/t5/Troubleshooting/Synthetic-Recorder-Extension-blocked-in-incognito-mode-when/tac-p/256996#M738 bill_smith 2024-09-24T15:25:04Z https://community.dynatrace.com/t5/Troubleshooting/Synthetic-Recorder-Extension-blocked-in-incognito-mode-when/tac-p/257003#M739 <P>It’s mostly via Customer’s Group Policy to ensure&nbsp;uniformity across all devices</P> Tue, 24 Sep 2024 15:51:29 GMT https://community.dynatrace.com/t5/Troubleshooting/Synthetic-Recorder-Extension-blocked-in-incognito-mode-when/tac-p/257003#M739 ShahbazKhan 2024-09-24T15:51:29Z