--- a/devtools/client/netmonitor/src/assets/styles/MdnLink.css
+++ b/devtools/client/netmonitor/src/assets/styles/MdnLink.css
@@ -1,20 +1,20 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /* Learn more links */
 
-.learn-more-link::before {
+.network-monitor .learn-more-link::before {
   background-image: url(chrome://devtools/skin/images/help.svg);
 }
 
-.tree-container .treeTable tr .learn-more-link {
+.network-monitor .tree-container .treeTable tr .learn-more-link {
   position: absolute;
   top: 0;
   left: 0;
   padding: 0;
 }
 
-.tree-container .treeTable tr:not(:hover) .learn-more-link {
+.network-monitor .tree-container .treeTable tr:not(:hover) .learn-more-link {
   opacity: 0.1;
 }

--- a/devtools/client/netmonitor/src/assets/styles/NetworkDetailsPanel.css
+++ b/devtools/client/netmonitor/src/assets/styles/NetworkDetailsPanel.css
@@ -1,396 +1,396 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /* Network details panel */
 
-.network-details-panel {
+.network-monitor .network-details-panel {
   width: 100%;
   height: 100%;
   overflow: hidden;
 }
 
-.panel-container {
+.network-monitor .panel-container {
   height: 100%;
 }
 
-.panel-container,
-.properties-view {
+.network-monitor .panel-container,
+.network-monitor .properties-view {
   display: flex;
   flex-direction: column;
   overflow-x: hidden;
   overflow-y: auto;
 }
 
-.panel-container .tree-container .objectBox {
+.network-monitor .panel-container .tree-container .objectBox {
   white-space: normal;
   word-wrap: break-word;
 }
 
-.properties-view {
+.network-monitor .properties-view {
   flex-grow: 1;
 }
 
-.properties-view .searchbox-section {
+.network-monitor .properties-view .searchbox-section {
   flex: 0 1 auto;
 }
 
-.properties-view .devtools-searchbox {
+.network-monitor .properties-view .devtools-searchbox {
   padding: 0;
 }
 
-.properties-view .devtools-searchbox input {
+.network-monitor .properties-view .devtools-searchbox input {
   margin: 1px 3px;
 }
 
 /* Empty notices in tab panels */
 
-.empty-notice {
+.network-monitor .empty-notice {
   color: var(--theme-body-color-inactive);
   padding: 3px 8px;
   text-align: center;
   display: flex;
   align-items: center;
   justify-content: center;
   height: 100%;
   font-size: 24px;
 }
 
 /* Text inputs in tab panels */
 
-.textbox-input {
+.network-monitor .textbox-input {
   text-overflow: ellipsis;
   border: none;
   background: none;
   color: inherit;
   width: 100%;
 }
 
-.textbox-input:focus {
+.network-monitor .textbox-input:focus {
   outline: 0;
   box-shadow: var(--theme-focus-box-shadow-textbox);
 }
 
 /* Tree table in tab panels */
 
-.tree-container, .tree-container .treeTable {
+.network-monitor .tree-container, .tree-container .treeTable {
   position: relative;
   height: 100%;
   width: 100%;
   overflow: auto;
   flex: 1;
 }
 
-.tree-container .treeTable,
-.tree-container .treeTable tbody {
+.network-monitor .tree-container .treeTable,
+.network-monitor .tree-container .treeTable tbody {
   display: flex;
   flex-direction: column;
 }
 
-.tree-container .treeTable tbody {
+.network-monitor .tree-container .treeTable tbody {
   /* Apply flex to table will create an anonymous table element outside of tbody
    * See also http://stackoverflow.com/a/30851678
    * Therefore, we set height with this magic number in order to remove the
    * redundant scrollbar when source editor appears.
    */
   height: calc(100% - 4px);
 }
 
-.tree-container .treeTable tr {
+.network-monitor .tree-container .treeTable tr {
   display: block;
   position: relative;
 }
 
 /* Make right td fill available horizontal space */
-.tree-container .treeTable td:last-child {
+.network-monitor .tree-container .treeTable td:last-child {
   width: 100%;
 }
 
-.properties-view .devtools-searchbox,
-.tree-container .treeTable .tree-section {
+.network-monitor .properties-view .devtools-searchbox,
+.network-monitor .tree-container .treeTable .tree-section {
   width: 100%;
   background-color: var(--theme-toolbar-background);
 }
 
-.tree-container .treeTable tr.tree-section:not(:first-child) td:not([class=""]) {
+.network-monitor .tree-container .treeTable tr.tree-section:not(:first-child) td:not([class=""]) {
   border-top: 1px solid var(--theme-splitter-color);
 }
 
-.properties-view .devtools-searchbox,
-.tree-container .treeTable tr.tree-section:not(:last-child) td:not([class=""]) {
+.network-monitor .properties-view .devtools-searchbox,
+.network-monitor .tree-container .treeTable tr.tree-section:not(:last-child) td:not([class=""]) {
   border-bottom: 1px solid var(--theme-splitter-color);
 }
 
-.tree-container .treeTable .tree-section > * {
+.network-monitor .tree-container .treeTable .tree-section > * {
   vertical-align: middle;
 }
 
-.tree-container .treeTable .treeRow.tree-section > .treeLabelCell > .treeLabel,
-.tree-container .treeTable .treeRow.tree-section > .treeLabelCell > .treeLabel:hover,
-.tree-container .treeTable .treeRow.tree-section > .treeValueCell:not(:hover) * {
+.network-monitor .tree-container .treeTable .treeRow.tree-section > .treeLabelCell > .treeLabel,
+.network-monitor .tree-container .treeTable .treeRow.tree-section > .treeLabelCell > .treeLabel:hover,
+.network-monitor .tree-container .treeTable .treeRow.tree-section > .treeValueCell:not(:hover) * {
   color: var(--theme-toolbar-color);
 }
 
-.tree-container .treeTable .treeValueCell {
+.network-monitor .tree-container .treeTable .treeValueCell {
   /* FIXME: Make value cell can be reduced to shorter width */
   max-width: 0;
   padding-inline-end: 5px;
 }
 
 /* Source editor in tab panels */
 
 /* If there is a source editor shows up in the last row of TreeView,
  * it should occupy the available vertical space.
  */
-.tree-container .treeTable .editor-row-container,
-.tree-container .treeTable tr:last-child td[colspan="2"] {
+.network-monitor .tree-container .treeTable .editor-row-container,
+.network-monitor .tree-container .treeTable tr:last-child td[colspan="2"] {
   display: block;
   height: 100%;
 }
 
-.source-editor-mount {
+.network-monitor .source-editor-mount {
   width: 100%;
   height: 100%;
 }
 
-.headers-summary-label,
-.tree-container .objectBox {
+.network-monitor .headers-summary-label,
+.network-monitor .tree-container .objectBox {
   white-space: nowrap;
 }
 
 /* Summary tabpanel */
 
-.tabpanel-summary-container {
+.network-monitor .tabpanel-summary-container {
   padding: 1px;
 }
 
-.tabpanel-summary-label {
+.network-monitor .tabpanel-summary-label {
   display: inline-block;
   padding-inline-start: 4px;
   padding-inline-end: 3px;
   font-weight: 600;
 }
 
-.tabpanel-summary-value {
+.network-monitor .tabpanel-summary-value {
   color: inherit;
   padding-inline-start: 3px;
 }
 
-.theme-dark .tabpanel-summary-value {
+.theme-dark .network-monitor .tabpanel-summary-value {
   color: var(--theme-selection-color);
 }
 
 /* Headers tabpanel */
 
-.headers-overview {
+.network-monitor .headers-overview {
   background: var(--theme-toolbar-background);
 }
 
-.headers-summary,
-.response-summary {
+.network-monitor .headers-summary,
+.network-monitor .response-summary {
   display: flex;
   align-items: center;
 }
 
-.headers-summary .devtools-button {
+.network-monitor .headers-summary .devtools-button {
   margin-inline-end: 6px;
 }
 
-.headers-summary .requests-list-status-icon {
+.network-monitor .headers-summary .requests-list-status-icon {
   min-width: 10px;
 }
 
-.headers-summary .raw-headers-container {
+.network-monitor .headers-summary .raw-headers-container {
   display: flex;
   width: 100%;
 }
 
-.headers-summary .raw-headers {
+.network-monitor .headers-summary .raw-headers {
   width: 50%;
   padding: 0 4px;
 }
 
-.headers-summary .raw-headers textarea {
+.network-monitor .headers-summary .raw-headers textarea {
   width: 100%;
   height: 50vh;
   font: message-box;
   resize: none;
 }
 
-.headers-summary .raw-headers .tabpanel-summary-label {
+.network-monitor .headers-summary .raw-headers .tabpanel-summary-label {
   padding: 0 0 4px 0;
 }
 
 .headers-summary .textbox-input {
   margin-inline-end: 2px;
 }
 
-.headers-summary .status-text {
+.network-monitor .headers-summary .status-text {
     width: auto!important;
 }
 
 /* Response tabpanel */
 
-.response-error-header {
+.network-monitor .response-error-header {
   margin: 0;
   padding: 3px 8px;
   background-color: var(--theme-highlight-red);
   color: var(--theme-selection-color);
 }
 
-.response-image-box {
+.network-monitor .response-image-box {
   display: flex;
   flex-direction: column;
   justify-content: center;
   align-items: center;
   overflow-y: auto;
   padding: 10px;
 }
 
-.response-image {
+.network-monitor .response-image {
   background: #fff;
   border: 1px dashed GrayText;
   margin-bottom: 10px;
   max-width: 300px;
   max-height: 100px;
 }
 
 /* Timings tabpanel */
 
-.timings-container {
+.network-monitor .timings-container {
   display: flex;
 }
 
-.timings-label {
+.network-monitor .timings-label {
   width: 10em;
 }
 
-.requests-list-timings-container {
+.network-monitor .requests-list-timings-container {
   display: flex;
   flex: 1;
   align-items: center;
 }
 
-.requests-list-timings-offset {
+.network-monitor .requests-list-timings-offset {
   transition: width 0.2s ease-out;
 }
 
-.requests-list-timings-box {
+.network-monitor .requests-list-timings-box {
   border: none;
   min-width: 1px;
   transition: width 0.2s ease-out;
 }
 
-.theme-firebug .requests-list-timings-total {
+.theme-firebug .network-monitor .requests-list-timings-total {
   color: var(--theme-body-color);
 }
 
 /* Stack trace panel */
 
-.stack-trace {
+.network-monitor .stack-trace {
   font-family: var(--monospace-font-family);
   /* The markup contains extra whitespace to improve formatting of clipboard text.
      Make sure this whitespace doesn't affect the HTML rendering */
   white-space: normal;
   padding: 5px;
 }
 
-.stack-trace .frame-link-source,
-.message-location .frame-link-source {
+.network-monitor .stack-trace .frame-link-source,
+.network-monitor .message-location .frame-link-source {
   /* Makes the file name truncated (and ellipsis shown) on the left side */
   direction: rtl;
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
 }
 
-.stack-trace .frame-link-source-inner,
-.message-location .frame-link-source-inner {
+.network-monitor .stack-trace .frame-link-source-inner,
+.network-monitor .message-location .frame-link-source-inner {
   /* Enforce LTR direction for the file name - fixes bug 1290056 */
   direction: ltr;
   unicode-bidi: embed;
 }
 
-.stack-trace .frame-link-function-display-name {
+.network-monitor .stack-trace .frame-link-function-display-name {
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
   margin-inline-end: 1ch;
 }
 
 /* Security tabpanel */
 
 /* Overwrite tree-view cell colon `:` for security panel and tree section */
-.security-panel .treeTable .treeLabelCell::after,
-.treeTable .tree-section .treeLabelCell::after {
+.network-monitor .security-panel .treeTable .treeLabelCell::after,
+.network-monitor .treeTable .tree-section .treeLabelCell::after {
   content: "";
 }
 
 /* Layout additional warning icon in tree value cell  */
-.security-info-value {
+.network-monitor .security-info-value {
   display: flex;
 }
 
-.security-warning-icon {
+.network-monitor .security-warning-icon {
   background-image: url(chrome://devtools/skin/images/alerticon-warning.png);
   background-size: 13px 12px;
   margin-inline-start: 5px;
   vertical-align: top;
   width: 13px;
   height: 12px;
 }
 
 @media (min-resolution: 1.1dppx) {
-  .security-warning-icon {
+  .network-monitor .security-warning-icon {
     background-image: url(chrome://devtools/skin/images/alerticon-warning@2x.png);
   }
 }
 
 /* Custom request panel */
 
-.custom-request-panel {
+.network-monitor .custom-request-panel {
   height: 100%;
   overflow: auto;
   padding: 0 4px;
   background-color: var(--theme-sidebar-background);
 }
 
-.theme-dark .custom-request-panel {
+.theme-dark .network-monitor .custom-request-panel {
   color: var(--theme-selection-color);
 }
 
-.custom-request-label {
+.network-monitor .custom-request-label {
   font-weight: 600;
 }
 
-.custom-request-panel textarea {
+.network-monitor .custom-request-panel textarea {
   resize: none;
   font: message-box;
 }
 
-.custom-header,
-.custom-method-and-url,
-.custom-request,
-.custom-section {
+.network-monitor .custom-header,
+.network-monitor .custom-method-and-url,
+.network-monitor .custom-request,
+.network-monitor .custom-section {
   display: flex;
 }
 
-.custom-header {
+.network-monitor .custom-header {
   flex-grow: 1;
   font-size: 1.1em;
   padding-top: 4px;
 }
 
-.custom-section {
+.network-monitor .custom-section {
   flex-direction: column;
   margin-top: 0.5em;
 }
 
-.custom-method-value {
+.network-monitor .custom-method-value {
   width: 4.5em;
 }
 
-.custom-url-value {
+.network-monitor .custom-url-value {
   flex-grow: 1;
   margin-inline-start: 6px;
 }

--- a/devtools/client/webconsole/new-console-output/components/message-types/NetworkEventMessage.js
+++ b/devtools/client/webconsole/new-console-output/components/message-types/NetworkEventMessage.js
@@ -115,17 +115,18 @@ function NetworkEventMessage({
     getNetworkRequest: () => {},
     sendHTTPRequest: () => {},
     setPreferences: () => {},
     triggerActivity: () => {},
   };
 
   // Only render the attachment if the network-event is
   // actually opened (performance optimization).
-  const attachment = open && dom.div({className: "network-info devtools-monospace"},
+  const attachment = open && dom.div({
+    className: "network-info network-monitor devtools-monospace"},
     TabboxPanel({
       connector,
       activeTabId: networkMessageActiveTabId,
       request: networkMessageUpdate,
       sourceMapService: serviceContainer.sourceMapService,
       openLink: serviceContainer.openLink,
       selectTab: (tabId) => {
         dispatch(actions.selectNetworkMessageTab(tabId));