--- a/devtools/client/netmonitor/test/browser.ini
+++ b/devtools/client/netmonitor/test/browser.ini
@@ -64,16 +64,17 @@ skip-if = (toolkit == "cocoa" && e10s) #
 [browser_net_copy_params.js]
 [browser_net_copy_response.js]
 [browser_net_copy_headers.js]
 [browser_net_copy_as_curl.js]
 skip-if = e10s # Bug 1091596
 [browser_net_cyrillic-01.js]
 [browser_net_cyrillic-02.js]
 [browser_net_details-no-duplicated-content.js]
+skip-if = (os == 'linux' && e10s && debug) # Bug 1242204
 [browser_net_filter-01.js]
 [browser_net_filter-02.js]
 [browser_net_filter-03.js]
 [browser_net_filter-04.js]
 [browser_net_footer-summary.js]
 [browser_net_html-preview.js]
 [browser_net_icon-preview.js]
 [browser_net_image-tooltip.js]