--- a/layout/base/AccessibleCaretManager.cpp
+++ b/layout/base/AccessibleCaretManager.cpp
@@ -853,27 +853,34 @@ AccessibleCaretManager::SetSelectionDrag
 void
 AccessibleCaretManager::SelectMoreIfPhoneNumber() const
 {
   SetSelectionDirection(eDirNext);
   ExtendPhoneNumberSelection(NS_LITERAL_STRING("forward"));
 
   SetSelectionDirection(eDirPrevious);
   ExtendPhoneNumberSelection(NS_LITERAL_STRING("backward"));
+
+  SetSelectionDirection(eDirNext);
 }
 
 void
 AccessibleCaretManager::ExtendPhoneNumberSelection(const nsAString& aDirection) const
 {
   nsIDocument* doc = mPresShell->GetDocument();
 
   // Extend the phone number selection until we find a boundary.
   Selection* selection = GetSelection();
 
   while (selection) {
+    // Backup the anchor focus range since both anchor node and focus node might
+    // be changed after calling Selection::Modify().
+    RefPtr<nsRange> oldAnchorFocusRange =
+      selection->GetAnchorFocusRange()->CloneRange();
+
     // Save current Focus position, and extend the selection one char.
     nsINode* focusNode = selection->GetFocusNode();
     uint32_t focusOffset = selection->FocusOffset();
     selection->Modify(NS_LITERAL_STRING("extend"),
                       aDirection,
                       NS_LITERAL_STRING("character"));
 
     // If the selection didn't change, (can't extend further), we're done.
@@ -883,20 +890,19 @@ AccessibleCaretManager::ExtendPhoneNumbe
     }
 
     // If the changed selection isn't a valid phone number, we're done.
     nsAutoString selectedText;
     selection->Stringify(selectedText);
     nsAutoString phoneRegex(NS_LITERAL_STRING("(^\\+)?[0-9\\s,\\-.()*#pw]{1,30}$"));
 
     if (!nsContentUtils::IsPatternMatching(selectedText, phoneRegex, doc)) {
-      // Backout the undesired selection extend, (collapse to original
-      // Anchor, extend to original Focus), before exit.
-      selection->Collapse(selection->GetAnchorNode(), selection->AnchorOffset());
-      selection->Extend(focusNode, focusOffset);
+      // Backout the undesired selection extend, restore the old anchor focus
+      // range before exit.
+      selection->SetAnchorFocusToRange(oldAnchorFocusRange);
       return;
     }
   }
 }
 
 void
 AccessibleCaretManager::SetSelectionDirection(nsDirection aDir) const
 {

--- a/mobile/android/tests/browser/robocop/testAccessibleCarets.html
+++ b/mobile/android/tests/browser/robocop/testAccessibleCarets.html
@@ -33,11 +33,13 @@
       rows="3" cols="8">הספר הוא טוב</textarea>
 
     <br>
     <input id="LTRphone" style="direction: ltr;" size="40"
       value="09876543210 .-.)(wp#*1034103410341034X">
     <br>
     <input id="RTLphone" style="direction: rtl;" size="40"
       value="התקשר +972 3 7347514 במשך זמן טוב">
+    <br>
+    <div><input value="DDs12">3 45<em id="bug1265750"> 678</em> 90</div>
 
   </body>
 </html>

--- a/mobile/android/tests/browser/robocop/testAccessibleCarets.js
+++ b/mobile/android/tests/browser/robocop/testAccessibleCarets.js
@@ -159,30 +159,32 @@ add_task(function* testAccessibleCarets(
 
   let ce_RTL_elem = doc.getElementById("RTLcontenteditable");
   let tc_RTL_elem = doc.getElementById("RTLtextContent");
   let i_RTL_elem = doc.getElementById("RTLinput");
   let ta_RTL_elem = doc.getElementById("RTLtextarea");
 
   let ip_LTR_elem = doc.getElementById("LTRphone");
   let ip_RTL_elem = doc.getElementById("RTLphone");
+  let bug1265750_elem = doc.getElementById("bug1265750");
 
   // Locate longpress midpoints for test elements, ensure expactations.
   let ce_LTR_midPoint = getCharPressPoint(doc, ce_LTR_elem, 0, "F");
   let tc_LTR_midPoint = getCharPressPoint(doc, tc_LTR_elem, 0, "O");
   let i_LTR_midPoint = getCharPressPoint(doc, i_LTR_elem, 0, "T");
   let ta_LTR_midPoint = getCharPressPoint(doc, ta_LTR_elem, 0, "W");
 
   let ce_RTL_midPoint = getCharPressPoint(doc, ce_RTL_elem, 0, "א");
   let tc_RTL_midPoint = getCharPressPoint(doc, tc_RTL_elem, 0, "ת");
   let i_RTL_midPoint = getCharPressPoint(doc, i_RTL_elem, 0, "ל");
   let ta_RTL_midPoint = getCharPressPoint(doc, ta_RTL_elem, 0, "ה");
 
   let ip_LTR_midPoint = getCharPressPoint(doc, ip_LTR_elem, 8, "2");
   let ip_RTL_midPoint = getCharPressPoint(doc, ip_RTL_elem, 9, "2");
+  let bug1265750_midPoint = getCharPressPoint(doc, bug1265750_elem, 2, "7");
 
   // Longpress various LTR content elements. Test focused element against
   // expected, and selected text against expected.
   let result = getLongPressResult(browser, ce_LTR_midPoint);
   is(result.focusedElement, ce_LTR_elem, "Focused element should match expected.");
   is(result.text, "Find", "Selected text should match expected text.");
 
   result = getLongPressResult(browser, tc_LTR_midPoint);
@@ -199,16 +201,21 @@ add_task(function* testAccessibleCarets(
 
   result = getLongPressResult(browser, ip_LTR_midPoint);
   is(result.focusedElement, ip_LTR_elem, "Focused element should match expected.");
   is(result.text, "09876543210 .-.)(wp#*103410341",
     "Selected phone number should match expected text.");
   is(result.text.length, 30,
     "Selected phone number length should match expected maximum.");
 
+  result = getLongPressResult(browser, bug1265750_midPoint);
+  is(result.focusedElement, null, "Focused element should match expected.");
+  is(result.text, "3 45 678 90",
+    "Selected phone number should match expected text.");
+
   // Longpress various RTL content elements. Test focused element against
   // expected, and selected text against expected.
   result = getLongPressResult(browser, ce_RTL_midPoint);
   is(result.focusedElement, ce_RTL_elem, "Focused element should match expected.");
   is(result.text, "איפה", "Selected text should match expected text.");
 
   result = getLongPressResult(browser, tc_RTL_midPoint);
   is(result.focusedElement, null, "No focused element is expected.");