Could someone explain why Speed Tracer shows some "Script Evaluation" even for plain vanilla HTML pages with no <script> tags? I see two scripts: the first one

Could someone explain why Speed Tracer shows some "Script Evaluation" even for plain vanilla HTML pages with no <script> tags? I see two scripts: the first one has the URL field blank, while the second one reads "chrome-extension://ognampngfcbddbfemdapefohjiobgbdl/data_loader.js". Thanks!