From 5c9fd5c5c635b2fe23efec064dc8ca3509befbd5 Mon Sep 17 00:00:00 2001
From: JustOff <Off.Just.Off@gmail.com>
Date: Sat, 27 Oct 2018 21:35:56 +0300
Subject: [PATCH] Use a separate process to generate thumbnails only when
 multi-process mode is enabled

---
 toolkit/components/thumbnails/BackgroundPageThumbs.jsm | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/toolkit/components/thumbnails/BackgroundPageThumbs.jsm b/toolkit/components/thumbnails/BackgroundPageThumbs.jsm
index 7b86fa07c8..3eec9827d2 100644
--- a/toolkit/components/thumbnails/BackgroundPageThumbs.jsm
+++ b/toolkit/components/thumbnails/BackgroundPageThumbs.jsm
@@ -206,9 +206,13 @@ const BackgroundPageThumbs = {
 
     let browser = this._parentWin.document.createElementNS(XUL_NS, "browser");
     browser.setAttribute("type", "content");
-    browser.setAttribute("remote", "true");
     browser.setAttribute("disableglobalhistory", "true");
 
+    if (Services.prefs.getPrefType("browser.tabs.remote") == Services.prefs.PREF_BOOL &&
+        Services.prefs.getBoolPref("browser.tabs.remote")) {
+      browser.setAttribute("remote", "true");
+    }
+
     if (Services.prefs.getBoolPref(ABOUT_NEWTAB_SEGREGATION_PREF)) {
       // Use the private container for thumbnails.
       let privateIdentity =