What?

Brave's default new tab when in incognito has a gradient wallpaper that matches the theme of it's incognito window, this replicates that in Firefox's default incognito new tab.

Brave

Firefox

Apply Gradient

Literally just makes the new tab background have that gradient.

/* Makes Private New Tab Look More Like Brave */
/* Thanks u/It_Was_The_Other_Guy */
html.private{ background-image: linear-gradient(rgb(56, 25, 128), rgb(12, 4, 30)) }

Removes Search Bar From Private Windows

Removes the useless search bar from the centre of the page.

/* Removes Search Bar From Private Windows */
.search-handoff-button, 
.search-handoff-button:active, 
.search-handoff-button:enabled:hover:active,
.search-inner-wrapper {
    display: none !important;
}

Change Promotional VPN Header

Changes the default header to something more Brave like

/* Change Promotional VPN Header */
/* Butcher Original Description Text*/
.promo-content h1 {
    text-indent: -9999px;
    line-height: 0; /* Collapse the original line */
}
/* Custom Header Text*/
.promo-content h1::after {
    content: "Private Browsing Isn't As Private As You Might Think";
    text-indent: 0;
    display: block;
    line-height: initial; /* New content takes up original line height */
}

Change Promotional VPN Details

Changes the default description to something more Brave like

/* Change Promotional VPN Details */
/* Massacre Original Description Text*/
.promo-content p {
    text-indent: -9999px;
    line-height: 0; /* Collapse the original line */
}
/* Custom Description Text*/
.promo-content p::after {
    content: 
		"Firefox doesn't remember what you do in a Private Window. Sites you visit won't show up in your history, and cookies vanish when you're done. Private Windows don't make you completely anonymous online and and a VPN is recommended.";
    text-indent: 0;
    display: block;
    line-height: initial; /* New content takes up original line height */
}

Removes Top Padding From Promotional VPN Message

Kills dumb advertising 🙄

/* Removes Top Padding From Promotional VPN Message */
.promo.below-search {
    padding: 0px 22px 0 !important;
}

Reduce Space Between Firefox Logo & Safety Message

Makes everything more cozy.

/* Reduce Space Between Firefox Logo & Safety Message */
.logo-and-wordmark {
    margin-bottom: 20px !important;
}

Terminate VPN Button

Kills dumb advertising again 🙄

/* Terminate VPN Button */
.promo-cta a {
    display: none !important;
}

Reduce Spacing Between Text & Heading

Yea

/* Reduce Spacing Between Text & Heading */
.promo-content p {
    line-height: 0em !important;
    margin-top: -3px !important;
}

Removes Old Warning Message

Removes silly old warning.

/* Removes Old Warning Message */
.info {
    display: none !important;
}

/* Makes Private New Tab Look More Like Brave */
/* Thanks u/It_Was_The_Other_Guy */
html.private{ background-image: linear-gradient(rgb(56, 25, 128), rgb(12, 4, 30)) }

/* Removes Search Bar From Private Windows */
.search-handoff-button, 
.search-handoff-button:active, 
.search-handoff-button:enabled:hover:active,
.search-inner-wrapper {
    display: none !important;
}

/* Removes Top Padding From Promotional VPN Message */
.promo.below-search {
    padding: 0px 22px 0 !important;
}

/* Reduce Space Between Firefox Logo & Safety Message */
.logo-and-wordmark {
    margin-bottom: 20px !important;
}

/* Change Promotional VPN Header */
/* Butcher Original Description Text*/
.promo-content h1 {
    text-indent: -9999px;
    line-height: 0; /* Collapse the original line */
}
/* Custom Header Text*/
.promo-content h1::after {
    content: "Private Browsing Isn't As Private As You Might Think";
    text-indent: 0;
    display: block;
    line-height: initial; /* New content takes up original line height */
}

/* Change Promotional VPN Details */
/* Massacre Original Description Text*/
.promo-content p {
    text-indent: -9999px;
    line-height: 0; /* Collapse the original line */
}
/* Custom Description Text*/
.promo-content p::after {
    content: 
		"Firefox doesn't remember what you do in a Private Window. Sites you visit won't show up in your history, and cookies vanish when you're done. Private Windows don't make you completely anonymous online and and a VPN is recommended.";
    text-indent: 0;
    display: block;
    line-height: initial; /* New content takes up original line height */
}

/* Reduce Spacing Between Text & Heading */
.promo-content p {
    line-height: 0em !important;
    margin-top: -3px !important;
}

/* Terminate VPN Button */
.promo-cta a {
    display: none !important;
}

/* Removes Old Warning Message */
.info {
    display: none !important;
}