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I'm on Linux.

I've been using this method to setup a custom new tab page for Firefox for almost 4 years, and it has worked great: https://jamesnorth.net/knowledge-base/article/firefox-new-tab-page

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Navigate to /usr/lib/firefox.

Create autoconfig.cfg:

// var {classes:Cc,interfaces:Ci,utils:Cu} = Components;

/* set new tab page */ try {

 Cu.import("resource:///modules/AboutNewTab.jsm");  
 var newTabURL = "file:///home/james/ff/index.html";  
 AboutNewTab.newTabURL = newTabURL;  

} catch(e){Cu.reportError(e);} // report errors in the Browser Console

Create defaults/pref/autoconfig.js:

// pref("general.config.filename", "autoconfig.cfg"); pref("general.config.obscure_value", 0); pref("general.config.sandbox_enabled", false);

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However, upon updating to Firefox 136, I only get a blank page. All of my autoconfig files still exist in /usr/lib/firefox.

When I create a new tab with Ctrl+T, it's a blank page. When I create a new window, it loads the local page I want it to load with the file path in the URL (which it never had before; the URL bar was blank in Firefox 135). So it seems to be partially working.

Any tips?

I have change my home page to DuckDuckGo, but when I click on a new tab, "+" I get Firefox. I tried blank and it is indeed blank, so how do I set new tab so it opens DuckDuckGo? (Read all help articles.)

I cannot change the background image when my Firefox app opens on my MS Windows laptop. During set-up, the system had me select an image, but I want to change it as I find it distracting. Thanks!

This has been asked before here, but it seems currently there is no solution:

Firefox's default behavior when using the mouse middle-click on an empty area of the tab bar area will create a new tab; I don't want this behavior. How can I disable it?

On the posts I found here, they mention using UserChrome.css, I enabled it and tried, doesn't work. custom styles are enabled but not disabling this feature.

I use DisplayFusion on my multi-monitor setup since years, and middle-clicking a window title bar or Chrome tab bar or Firefox tab bar will move the current window to a second monitor.

Currently with Firefox, middle-clicking the tab bar will move the window to the second monitor AND open a new tab. I use it a lot with YouTube, so when I move a playing video to the second monitor, I get an empty tab with audio in the background.

I recently moved from Chrome to Firefox, but this is driving me crazy.

I used to have an image (dark, stormy sky) in my new tabs, that appeared as a background to my grid of websites (8 columns x 4 rows). Suddenly, I haven't seen it today - just noticed that it's just black. Can't seem to find where to access the different images. Would like the path to find it, or learn if it's no longer available or if I can make my own. Thanks.