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STR: 1. Install NoScript firefox extension. 2. Run ./mach resource-usage (and fix URL as-needed to work around bug 1124260) ACTUAL RESULTS: You get a mostly-empty page, with these contents: > Build Resource Usage Report > > Wall Time (s) > Start Date > End Date > CPU % > Write Bytes > Read Bytes > Write Time > Read Time It just looks like mach failed to record any resource usage. (BUT, once you notice that scripts are being blocked, you can enable them & see the pretty graphics & data.) EXPECTED RESULTS: There should be a <noscript> tag in the page, to say that the page requires scirpting & please enable scripts to see your resource usage.