[KATC] Add support for doubles to indexeddb parsing (#1963)

ee/indexeddb/values.go

@@ -26,6 +26,7 @@ const (
 	// numbers
 	tokenInt32  byte = 0x49 // I
 	tokenUint32 byte = 0x55 // U
+	tokenDouble byte = 0x4e // N
 	// strings
 	tokenAsciiStr byte = 0x22 // "
 	tokenUtf16Str byte = 0x63 // c
@@ -207,6 +208,12 @@ func deserializeObject(ctx context.Context, slogger *slog.Logger, srcReader *byt
 				return obj, fmt.Errorf("decoding int32 for `%s`: %w", currentPropertyName, err)
 			}
 			obj[currentPropertyName] = []byte(strconv.Itoa(int(propertyInt)))
+		case tokenDouble:
+			var d float64
+			if err := binary.Read(srcReader, binary.NativeEndian, &d); err != nil {
+				return obj, fmt.Errorf("decoding double for `%s`: %w", currentPropertyName, err)
+			}
+			obj[currentPropertyName] = []byte(strconv.FormatFloat(d, 'f', -1, 64))
 		case tokenBeginSparseArray:
 			arr, err := deserializeSparseArray(ctx, slogger, srcReader)
 			if err != nil {

ee/katc/test_data/README.md

@@ -13,7 +13,7 @@ Loading the page will populate IndexedDB with the desired data. You should also
 console log message to this effect.
 
 The file will now be available with other IndexedDB files. On macOS, Chrome indexeddb files
-can be found at `/Users/<my-username>/Library/Application Support/Google/Chrome/Default/IndexedDB/file__0.indexeddb.leveldb`.
+can be found at `/Users/<my-username>/Library/Application Support/Google/Chrome/<Profile Name>/IndexedDB/file__0.indexeddb.leveldb`.
 (The name of the indexeddb file will likely be the same, but you can confirm the origin
 matches in Dev Tools in your browser by going to Application => IndexedDB => launchertestdb.)
 On macOS, Firefox sqlite files can be found at a path similar to this one:

ee/katc/test_data/main.js

@@ -55,7 +55,8 @@
                         }
                     ],
                 noDetails: [], // Empty array
-                email: "[email protected]"
+                email: "[email protected]",
+                someTimestamp: 1720034607 // *unint32
             },
             {
                 uuid: "03b3e669-3e7a-482c-83b2-8a800b9f804f",
@@ -86,7 +87,8 @@
                         }
                     ],
                 noDetails: [], // Empty array
-                email: "[email protected]"
+                email: "[email protected]",
+                someTimestamp: 1726096312 // *unint32
             },
         ];
         objectStore.transaction.oncomplete = (event) => {