diff --git a/firefox.go b/firefox.go
index 34831d8..d30e753 100644
--- a/firefox.go
+++ b/firefox.go
@@ -52,8 +52,8 @@ const (
 )
 
 var Firefox = BrowserPaths{
-	BookmarkFile: "places.sqlite",
-	BookmarkDir:  "/home/spike/.mozilla/firefox/7otsk3vs.test_bookmarks",
+	BookmarkFile: mozilla.BookmarkFile,
+	BookmarkDir:  mozilla.BookmarkDir,
 }
 
 const (
@@ -171,7 +171,7 @@ func NewFFBrowser() IBrowser {
 	w := &Watch{
 		Path:       expandedBaseDir,
 		EventTypes: []fsnotify.Op{fsnotify.Write},
-		EventNames: []string{path.Join(expandedBaseDir, "places.sqlite-wal")},
+		EventNames: []string{filepath.Join(expandedBaseDir, "places.sqlite-wal")},
 		ResetWatch: false,
 	}
 
@@ -186,18 +186,6 @@ func NewFFBrowser() IBrowser {
 
 	go utils.ReduceEvents(MozMinJobInterval, browser.eventsChan, browser)
 
-	// Testing
-	pusers, err := utils.FileProcessUsers(browser.GetBookmarksPath())
-	if err != nil {
-		fflog.Error(err)
-	}
-	for _, p := range pusers {
-		pname, err := p.Name()
-		if err != nil {
-			fflog.Error(err)
-		}
-		fflog.Debugf("%s is using bookmark file", pname)
-	}
 	//
 	//
 	//
diff --git a/main.go b/main.go
index 9a4a7ff..773d8fe 100644
--- a/main.go
+++ b/main.go
@@ -44,7 +44,7 @@ func mainLoop() {
 	//_ = cb.Watch()
 	//_ = ff.Watch()
 
-	err := r.Run("127.0.0.1:4242")
+	err := r.Run("127.0.0.1:4243")
 	if err != nil {
 		log.Panic(err)
 	}
diff --git a/mozilla/firefox.go b/mozilla/firefox.go
index ad9e744..5fafa3f 100644
--- a/mozilla/firefox.go
+++ b/mozilla/firefox.go
@@ -2,10 +2,19 @@ package mozilla
 
 import (
 	"errors"
+	"fmt"
 	"gomark/logging"
+	"gomark/utils"
 	"path"
 )
 
+var fflog = logging.GetLogger("FF")
+
+const (
+	BookmarkFile = "places.sqlite"
+	BookmarkDir  = "/home/spike/.mozilla/firefox/7otsk3vs.test_bookmarks"
+)
+
 const (
 	// This option disables the VFS lock on firefox
 	// Sqlite allows file locking of the database using the local file system VFS.
@@ -39,7 +48,7 @@ var (
 // property in prefs.js
 
 func UnlockPlaces(dir string) error {
-	log.Debug("Unlocking ...")
+	log.Debug("Unlocking places.sqlite ...")
 
 	prefsPath := path.Join(dir, PrefsFile)
 
@@ -52,13 +61,28 @@ func UnlockPlaces(dir string) error {
 
 	// If pref already defined and true raise an error
 	if pref {
-		log.Criticalf("pref <%s> already defined as <%s>",
+		log.Criticalf("pref <%s> already defined as <%v>",
 			PrefMultiProcessAccess, pref)
 		return ErrMultiProcessAlreadyEnabled
 
 		// Set the preference
 	} else {
-		log.Debug("pref not defined")
+
+		// Checking if firefox is running
+		// TODO: #multiprocess add CLI to unlock places.sqlite
+		pusers, err := utils.FileProcessUsers(path.Join(BookmarkDir, BookmarkFile))
+		if err != nil {
+			fflog.Error(err)
+		}
+
+		for pid, p := range pusers {
+			pname, err := p.Name()
+			if err != nil {
+				fflog.Error(err)
+			}
+			return errors.New(fmt.Sprintf("multiprocess not enabled and %s(%d) is running", pname, pid))
+		}
+		// End testing
 
 		// enable multi process access in firefox
 		err = SetPrefBool(prefsPath,
diff --git a/utils/process.go b/utils/process.go
index 61bc799..626101b 100644
--- a/utils/process.go
+++ b/utils/process.go
@@ -2,12 +2,13 @@ package utils
 
 import (
 	"os"
+	"path/filepath"
 
 	psutil "github.com/shirou/gopsutil/process"
 )
 
-func FileProcessUsers(path string) ([]*psutil.Process, error) {
-	var fusers []*psutil.Process
+func FileProcessUsers(path string) (map[int32]*psutil.Process, error) {
+	fusers := make(map[int32]*psutil.Process)
 
 	processes, err := psutil.Processes()
 	if err != nil &&
@@ -15,21 +16,28 @@ func FileProcessUsers(path string) ([]*psutil.Process, error) {
 		return nil, err
 	}
 
+	// Eval symlinks
+	relPath, err := filepath.EvalSymlinks(path)
+	if err != nil {
+		return nil, err
+	}
+
+	//log.Debugf("checking against path: %s", relPath)
 	for _, p := range processes {
 
 		files, err := p.OpenFiles()
-		errPath, _ := err.(*os.PathError)
+		_, isPathError := err.(*os.PathError)
 
-		if err != nil &&
-			errPath.Err.Error() != os.ErrPermission.Error() {
-			log.Error(err)
-			return nil, err
+		if err != nil && isPathError {
+			continue
 		}
 
 		// Check if path in files
+
 		for _, f := range files {
-			if f.Path == path {
-				fusers = append(fusers, p)
+			//log.Debug(f)
+			if f.Path == relPath {
+				fusers[p.Pid] = p
 			}
 		}