diff --git a/src/request-explorer/request-explorer.css b/src/request-explorer/request-explorer.css
index 39e588f..f72909e 100644
--- a/src/request-explorer/request-explorer.css
+++ b/src/request-explorer/request-explorer.css
@@ -164,6 +164,46 @@ th {
   overflow-wrap: anywhere;
 }
 
+.request-groups {
+  display: grid;
+  gap: 16px;
+}
+
+.request-context-card {
+  padding: 14px;
+  border: 1px solid #334155;
+  border-radius: 4px;
+  background: #172033;
+}
+
+.request-context-summary {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: 8px;
+  margin: 0 0 12px;
+}
+
+.request-context-summary div {
+  min-width: 0;
+  padding: 9px 10px;
+  border: 1px solid #334155;
+  border-radius: 4px;
+  background: #1f2937;
+}
+
+.request-context-summary dt {
+  margin: 0 0 5px;
+  font-size: 12px;
+  color: #cbd5e1;
+}
+
+.request-context-summary dd {
+  margin: 0;
+  font-size: 13px;
+  font-weight: 700;
+  overflow-wrap: anywhere;
+}
+
 .request-detail {
   margin-top: 18px;
 }
@@ -222,7 +262,17 @@ th {
     grid-template-columns: 1fr;
   }
 
+  .request-context-summary {
+    grid-template-columns: 1fr;
+  }
+
   .inspector-table th {
     width: 150px;
   }
 }
+
+@media (min-width: 641px) and (max-width: 980px) {
+  .request-context-summary {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+}
diff --git a/src/request-explorer/request-explorer.html b/src/request-explorer/request-explorer.html
index 6368260..227c504 100644
--- a/src/request-explorer/request-explorer.html
+++ b/src/request-explorer/request-explorer.html
@@ -32,22 +32,7 @@
           Keine beobachteten Requests vorhanden.
         </p>
         <div id="request-content" hidden>
-          <div class="request-list-wrap">
-            <table class="request-list">
-              <thead>
-                <tr>
-                  <th scope="col">Letzte Beobachtung</th>
-                  <th scope="col">Empf&auml;nger-Origin</th>
-                  <th scope="col">Pfad</th>
-                  <th scope="col">Third-Party</th>
-                  <th scope="col">Consent-Parameter</th>
-                  <th scope="col">Consent-Korrelation</th>
-                  <th scope="col">SeenCount</th>
-                </tr>
-              </thead>
-              <tbody id="request-list"></tbody>
-            </table>
-          </div>
+          <div id="request-groups" class="request-groups"></div>
 
           <section class="request-detail" aria-labelledby="request-detail-title">
             <h2 id="request-detail-title">Ausgew&auml;hlter Request</h2>
diff --git a/src/request-explorer/request-explorer.js b/src/request-explorer/request-explorer.js
index bbc8c8f..5be45cd 100644
--- a/src/request-explorer/request-explorer.js
+++ b/src/request-explorer/request-explorer.js
@@ -4,7 +4,7 @@ const requestLoadedCount = document.getElementById("request-loaded-count");
 const requestLatestSeen = document.getElementById("request-latest-seen");
 const requestEmpty = document.getElementById("request-empty");
 const requestContent = document.getElementById("request-content");
-const requestList = document.getElementById("request-list");
+const requestGroups = document.getElementById("request-groups");
 const requestDetailSummary = document.getElementById("request-detail-summary");
 const requestDetailJson = document.getElementById("request-detail-json");
 const requestDetailCorrelation = document.getElementById(
@@ -18,6 +18,7 @@ const requestDetailTechnicalFields = document.getElementById(
 );
 
 let observedRequests = [];
+let observedRequestGroups = [];
 let selectedRequestFingerprint = null;
 
 document.addEventListener("DOMContentLoaded", async () => {
@@ -35,6 +36,7 @@ async function renderObservedRequests() {
     }
 
     observedRequests = result.observedRequests ?? [];
+    observedRequestGroups = buildObservedRequestGroups(observedRequests);
     updateOverview();
 
     if (observedRequests.length === 0) {
@@ -50,10 +52,11 @@ async function renderObservedRequests() {
         observedRequests[0]?.requestFingerprint ?? null;
     }
 
-    renderRequestList();
+    renderRequestGroups();
     renderSelectedRequest();
   } catch (error) {
     observedRequests = [];
+    observedRequestGroups = [];
     updateOverview();
     requestEmpty.hidden = false;
     requestContent.hidden = true;
@@ -72,57 +75,141 @@ function updateOverview() {
 
 function renderNoObservedRequests() {
   selectedRequestFingerprint = null;
-  requestList.textContent = "";
+  requestGroups.textContent = "";
   clearRequestDetails();
   requestEmpty.hidden = false;
   requestContent.hidden = true;
   requestEmpty.textContent = "Keine beobachteten Requests vorhanden.";
 }
 
-function renderRequestList() {
-  requestList.textContent = "";
+function renderRequestGroups() {
+  requestGroups.textContent = "";
 
-  for (const observedRequest of observedRequests) {
-    const row = document.createElement("tr");
-    const isSelected =
-      observedRequest?.requestFingerprint === selectedRequestFingerprint;
-
-    row.className = isSelected ? "is-selected" : "";
-    row.tabIndex = 0;
-    row.setAttribute("role", "button");
-    row.setAttribute("aria-pressed", isSelected ? "true" : "false");
-
-    row.addEventListener("click", () => {
-      selectObservedRequest(observedRequest?.requestFingerprint ?? null);
-    });
-
-    row.addEventListener("keydown", (event) => {
-      if (event.key === "Enter" || event.key === " ") {
-        event.preventDefault();
-        selectObservedRequest(observedRequest?.requestFingerprint ?? null);
-      }
-    });
-
-    appendListCell(row, formatNullable(observedRequest?.lastSeenAt));
-    appendListCell(
-      row,
-      formatNullable(observedRequest?.request?.origin),
-      "origin-cell"
-    );
-    appendListCell(
-      row,
-      formatNullable(observedRequest?.request?.pathname),
-      "path-cell"
-    );
-    appendListCell(row, formatThirdParty(observedRequest?.request?.thirdParty));
-    appendListCell(row, formatYesNo(hasConsentParams(observedRequest)));
-    appendListCell(row, formatYesNo(hasConsentCorrelation(observedRequest)));
-    appendListCell(row, formatNullable(observedRequest?.seenCount), "numeric");
-
-    requestList.append(row);
+  for (const group of observedRequestGroups) {
+    requestGroups.append(buildRequestGroupElement(group));
   }
 }
 
+function buildRequestGroupElement(group) {
+  const section = document.createElement("section");
+  const title = document.createElement("h3");
+  const context = document.createElement("dl");
+  const tableWrap = document.createElement("div");
+  const table = document.createElement("table");
+  const head = document.createElement("thead");
+  const headRow = document.createElement("tr");
+  const body = document.createElement("tbody");
+
+  section.className = "request-context-card";
+  title.textContent = "Technisch beobachteter Vorgang";
+  context.className = "request-context-summary";
+  tableWrap.className = "request-list-wrap";
+  table.className = "request-list";
+
+  appendDefinition(context, "Seiten-/Dokumentkontext", group.contextLabel);
+  appendDefinition(context, "Tab / Frame", group.tabFrameLabel);
+  appendDefinition(context, "Zeitraum", group.periodLabel);
+  appendDefinition(context, "Requests", String(group.requests.length));
+  appendDefinition(
+    context,
+    "Empfaenger-Origins",
+    String(group.recipientOriginCount)
+  );
+  appendDefinition(
+    context,
+    "Third-Party-Requests",
+    String(group.thirdPartyCount)
+  );
+  appendDefinition(
+    context,
+    "Requests mit Consent-Parametern",
+    String(group.consentParamCount)
+  );
+  appendDefinition(
+    context,
+    "Requests mit Consent-Korrelation",
+    String(group.consentCorrelationCount)
+  );
+
+  [
+    "Letzte Beobachtung",
+    "Empfaenger-Origin",
+    "Pfad",
+    "Third-Party",
+    "Consent-Parameter",
+    "Consent-Korrelation",
+    "SeenCount"
+  ].forEach((label) => {
+    const cell = document.createElement("th");
+
+    cell.scope = "col";
+    cell.textContent = label;
+    headRow.append(cell);
+  });
+
+  for (const observedRequest of group.requests) {
+    body.append(buildRequestRow(observedRequest));
+  }
+
+  head.append(headRow);
+  table.append(head, body);
+  tableWrap.append(table);
+  section.append(title, context, tableWrap);
+
+  return section;
+}
+
+function appendDefinition(list, label, value) {
+  const item = document.createElement("div");
+  const term = document.createElement("dt");
+  const description = document.createElement("dd");
+
+  term.textContent = label;
+  description.textContent = value;
+  item.append(term, description);
+  list.append(item);
+}
+
+function buildRequestRow(observedRequest) {
+  const row = document.createElement("tr");
+  const isSelected =
+    observedRequest?.requestFingerprint === selectedRequestFingerprint;
+
+  row.className = isSelected ? "is-selected" : "";
+  row.tabIndex = 0;
+  row.setAttribute("role", "button");
+  row.setAttribute("aria-pressed", isSelected ? "true" : "false");
+
+  row.addEventListener("click", () => {
+    selectObservedRequest(observedRequest?.requestFingerprint ?? null);
+  });
+
+  row.addEventListener("keydown", (event) => {
+    if (event.key === "Enter" || event.key === " ") {
+      event.preventDefault();
+      selectObservedRequest(observedRequest?.requestFingerprint ?? null);
+    }
+  });
+
+  appendListCell(row, formatNullable(observedRequest?.lastSeenAt));
+  appendListCell(
+    row,
+    formatNullable(observedRequest?.request?.origin),
+    "origin-cell"
+  );
+  appendListCell(
+    row,
+    formatNullable(observedRequest?.request?.pathname),
+    "path-cell"
+  );
+  appendListCell(row, formatThirdParty(observedRequest?.request?.thirdParty));
+  appendListCell(row, formatYesNo(hasConsentParams(observedRequest)));
+  appendListCell(row, formatYesNo(hasConsentCorrelation(observedRequest)));
+  appendListCell(row, formatNullable(observedRequest?.seenCount), "numeric");
+
+  return row;
+}
+
 function appendListCell(row, value, className) {
   const cell = document.createElement("td");
 
@@ -136,7 +223,7 @@ function appendListCell(row, value, className) {
 
 function selectObservedRequest(requestFingerprint) {
   selectedRequestFingerprint = requestFingerprint;
-  renderRequestList();
+  renderRequestGroups();
   renderSelectedRequest();
 }
 
@@ -152,6 +239,10 @@ function renderSelectedRequest() {
   renderSummaryTable([
     ["Letzte Beobachtung", formatNullable(observedRequest?.lastSeenAt)],
     ["Erste Beobachtung", formatNullable(observedRequest?.firstSeenAt)],
+    ["Beobachtet um", formatNullable(getObservedAt(observedRequest))],
+    ["Seiten-/Dokumentkontext", getPageContextLabel(observedRequest)],
+    ["Tab-ID", formatUnknown(getTabId(observedRequest))],
+    ["Frame-ID", formatUnknown(getFrameId(observedRequest))],
     ["Empfaenger-Origin", formatNullable(observedRequest?.request?.origin)],
     ["Pfad", formatNullable(observedRequest?.request?.pathname)],
     ["Methode", formatNullable(observedRequest?.request?.method)],
@@ -251,18 +342,226 @@ function buildTechnicalFieldExtract(observedRequest) {
     schemaVersion: observedRequest?.schemaVersion ?? null,
     recordedAt: observedRequest?.recordedAt ?? null,
     recordingSource: observedRequest?.recordingSource ?? null,
+    observedAt: observedRequest?.observedAt ?? null,
     firstSeenAt: observedRequest?.firstSeenAt ?? null,
     lastSeenAt: observedRequest?.lastSeenAt ?? null,
     seenCount: observedRequest?.seenCount ?? null,
+    requestFingerprint: observedRequest?.requestFingerprint ?? null,
+    requestFingerprintSource: observedRequest?.requestFingerprintSource ?? null,
     context: observedRequest?.context ?? null,
     request: observedRequest?.request ?? null,
-    consentParams: observedRequest?.consentParams ?? null
+    consentParams: observedRequest?.consentParams ?? null,
+    correlation: observedRequest?.correlation ?? null
   };
 }
 
+function buildObservedRequestGroups(requests) {
+  const groupsByKey = new Map();
+
+  for (const observedRequest of requests) {
+    const key = buildObservedRequestGroupKey(observedRequest);
+    let group = groupsByKey.get(key);
+
+    if (!group) {
+      group = {
+        key,
+        contextLabel: getPageContextLabel(observedRequest),
+        tabFrameLabel: buildTabFrameLabel(observedRequest),
+        requests: []
+      };
+      groupsByKey.set(key, group);
+    }
+
+    group.requests.push(observedRequest);
+  }
+
+  return Array.from(groupsByKey.values())
+    .map(enrichObservedRequestGroup)
+    .sort((left, right) => {
+      return compareTimestampValues(right.lastSeenAt, left.lastSeenAt);
+    });
+}
+
+function buildObservedRequestGroupKey(observedRequest) {
+  return [
+    `tab:${formatKeyValue(getTabId(observedRequest))}`,
+    `frame:${formatKeyValue(getFrameId(observedRequest))}`,
+    `page:${getPageContextValue(observedRequest) ?? "unknown"}`
+  ].join("|");
+}
+
+function enrichObservedRequestGroup(group) {
+  const sortedRequests = [...group.requests].sort((left, right) => {
+    return compareTimestampValues(getObservedAt(left), getObservedAt(right));
+  });
+  const recipientOrigins = new Set(
+    sortedRequests
+      .map((observedRequest) => observedRequest?.request?.origin ?? null)
+      .filter((origin) => origin !== null && origin !== undefined && origin !== "")
+  );
+  let firstSeenAt = null;
+  let lastSeenAt = null;
+
+  for (const observedRequest of sortedRequests) {
+    firstSeenAt = pickTimestamp(firstSeenAt, observedRequest?.firstSeenAt, "min");
+    lastSeenAt = pickTimestamp(lastSeenAt, observedRequest?.lastSeenAt, "max");
+  }
+
+  return {
+    ...group,
+    requests: sortedRequests,
+    firstSeenAt,
+    lastSeenAt,
+    periodLabel: buildPeriodLabel(firstSeenAt, lastSeenAt),
+    recipientOriginCount: recipientOrigins.size,
+    thirdPartyCount: sortedRequests.filter((observedRequest) => {
+      return observedRequest?.request?.thirdParty === true;
+    }).length,
+    consentParamCount: sortedRequests.filter(hasConsentParams).length,
+    consentCorrelationCount: sortedRequests.filter(hasConsentCorrelation).length
+  };
+}
+
+function getPageContextLabel(observedRequest) {
+  return formatUnknown(getPageContextValue(observedRequest));
+}
+
+function getPageContextValue(observedRequest) {
+  return (
+    getFirstPresentValue(
+      observedRequest,
+      [
+        "pageUrl",
+        "documentUrl",
+        "initiator",
+        "sourceUrl",
+        "context.pageUrl",
+        "context.documentUrl",
+        "context.initiator",
+        "context.sourceUrl",
+        "request.pageUrl",
+        "request.documentUrl",
+        "request.initiator",
+        "request.sourceUrl"
+      ]
+    ) ?? null
+  );
+}
+
+function getTabId(observedRequest) {
+  return getFirstPresentValue(observedRequest, ["tabId", "context.tabId"]);
+}
+
+function getFrameId(observedRequest) {
+  return getFirstPresentValue(observedRequest, ["frameId", "context.frameId"]);
+}
+
+function getObservedAt(observedRequest) {
+  return getFirstPresentValue(observedRequest, [
+    "observedAt",
+    "firstSeenAt",
+    "lastSeenAt"
+  ]);
+}
+
+function getFirstPresentValue(source, paths) {
+  for (const path of paths) {
+    const value = getPathValue(source, path);
+
+    if (value !== null && value !== undefined && value !== "") {
+      return value;
+    }
+  }
+
+  return null;
+}
+
+function getPathValue(source, path) {
+  return path.split(".").reduce((value, key) => {
+    if (value === null || value === undefined || typeof value !== "object") {
+      return undefined;
+    }
+
+    return value[key];
+  }, source);
+}
+
+function buildTabFrameLabel(observedRequest) {
+  return `Tab ${formatUnknown(getTabId(observedRequest))} / Frame ${formatUnknown(
+    getFrameId(observedRequest)
+  )}`;
+}
+
+function pickTimestamp(current, candidate, direction) {
+  if (!current) {
+    return candidate ?? null;
+  }
+
+  if (!candidate) {
+    return current;
+  }
+
+  const comparison = compareTimestampValues(candidate, current);
+
+  if (direction === "min") {
+    return comparison < 0 ? candidate : current;
+  }
+
+  return comparison > 0 ? candidate : current;
+}
+
+function compareTimestampValues(left, right) {
+  const leftTime = Date.parse(left ?? "");
+  const rightTime = Date.parse(right ?? "");
+
+  if (Number.isNaN(leftTime) && Number.isNaN(rightTime)) {
+    return 0;
+  }
+
+  if (Number.isNaN(leftTime)) {
+    return -1;
+  }
+
+  if (Number.isNaN(rightTime)) {
+    return 1;
+  }
+
+  return leftTime - rightTime;
+}
+
+function buildPeriodLabel(firstSeenAt, lastSeenAt) {
+  if (!firstSeenAt && !lastSeenAt) {
+    return "unbekannt";
+  }
+
+  if (firstSeenAt === lastSeenAt || !lastSeenAt) {
+    return formatUnknown(firstSeenAt);
+  }
+
+  if (!firstSeenAt) {
+    return formatUnknown(lastSeenAt);
+  }
+
+  return `${firstSeenAt} bis ${lastSeenAt}`;
+}
+
+function formatKeyValue(value) {
+  return value === null || value === undefined || value === ""
+    ? "unknown"
+    : value;
+}
+
+function formatUnknown(value) {
+  if (value === null || value === undefined || value === "") {
+    return "unbekannt";
+  }
+
+  return String(value);
+}
+
 function formatNullable(value) {
   if (value === null || value === undefined || value === "") {
-    return "-";
+    return "unbekannt";
   }
 
   return String(value);
@@ -281,5 +580,5 @@ function formatThirdParty(value) {
 }
 
 function formatYesNo(value) {
-  return value ? "ja" : "nein";
+  return value ? "vorhanden" : "nicht vorhanden";
 }