gnu: icecat: Update to 68.8.0-guix0-preview1 [security fixes].

Includes fixes for CVE-2020-6831, CVE-2020-12387, CVE-2020-12388,
CVE-2020-12389, CVE-2020-12392, CVE-2020-12393, and CVE-2020-12395.

* gnu/packages/gnuzilla.scm (%icecat-version, %icecat-build-id): Update.
(icecat-source): Update gnuzilla commit, base version, and hashes.
Apply icecat-use-older-reveal-hidden-html.patch.
* gnu/packages/patches/icecat-makeicecat.patch: Adapt to new version.
* gnu/packages/patches/icecat-use-older-reveal-hidden-html.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

1 files changed, 70 insertions, 0 deletions

diff --git a/gnu/packages/patches/icecat-use-older-reveal-hidden-html.patch b/gnu/packages/patches/icecat-use-older-reveal-hidden-html.patch
new file mode 100644
index 0000000000..228adc23f1
--- /dev/null
+++ b/gnu/packages/patches/icecat-use-older-reveal-hidden-html.patch
@@ -0,0 +1,70 @@
+From 2e8618d22568b6e00892a17303d437dd700eca98 Mon Sep 17 00:00:00 2001
+From: Mark H Weaver <mhw@netris.org>
+Date: Tue, 5 May 2020 21:27:41 -0400
+Subject: [PATCH] Revert "Update Reveal hidden HTML."
+
+I prefer the user interface of the old version.
+
+This reverts commit f6e3adb6b2344ee2c7bb453a305fd2d6fb4c194c.
+---
+ .../passive_improve_css.js                    | 23 ++++++++++++++-----
+ 1 file changed, 17 insertions(+), 6 deletions(-)
+
+diff --git a/data/extensions/SubmitMe@0xbeef.coffee/passive_improve_css.js b/data/extensions/SubmitMe@0xbeef.coffee/passive_improve_css.js
+index 7692990..ca57982 100644
+--- a/data/extensions/SubmitMe@0xbeef.coffee/passive_improve_css.js
++++ b/data/extensions/SubmitMe@0xbeef.coffee/passive_improve_css.js
+@@ -10,6 +10,8 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
+ */
+ 
+ 
++var bad = [];
++
+ function escapeHTML (unsafe_str) {
+     return unsafe_str
+       .replace(/&/g, '&amp;')
+@@ -20,9 +22,14 @@ function escapeHTML (unsafe_str) {
+       .replace(/\//g, '&#x2F;')
+ }
+ 
++function dounhide(){
++        for(var i = 0; i < bad.length; i++){
++                        bad[i].remove();
++                }
++}
++
+ console.log("passive_improve_css.js");
+ function reveal_css(){
+-	var bad = [];
+ 
+ 	var elements = document.getElementsByTagName("style");
+ 	for(var i = 0; i < elements.length; i++){
+@@ -41,16 +48,20 @@ function reveal_css(){
+ 
+ 		}
+ 	}
+-	if(bad.length > 0 && window.confirm("Hidden HTML detected, would you like to reveal it?")){
+-		for(var i = 0; i < bad.length; i++){
+-			bad[i].remove();
+-		}
++	if(bad.length > 0){
++		const insertedDiv = document.createElement('div');
++		insertedDiv.innerHTML= '<p id="unhide" class="button white" style="text-decoration:none!important; color:#000!important;  font-size:1em !important; font-family:\'sans-serif\'!important; font-weight:normal !important; background-color:transparent!important; margin:0!important; padding:0!important; font-size:10px!important; line-height:1!important"' +
++			'alt="Click to reveal hidden elements in this page">' +
++	                '<span>Reveal hidden elements</span>' +
++			'</a>';
++		insertedDiv.style="position:fixed; bottom:1em; right:1em; opacity:0.8; z-index: 2147483647 !important; border-radius: 3px !important; background-color: #fff !important; padding: 0.5em !important;   box-shadow: 0 0 3px grey !important; font-color:#bbb!important; cursor: pointer!important;";
++		insertedDiv.addEventListener("click", dounhide, false);
++		document.body.insertBefore(insertedDiv, document.body.firstChild);
+ 	}
+ }
+ 
+ reveal_css();
+ 
+-
+ /*
+ var a = document.getElementsByTagName("style")[2];
+ var btn = document.createElement("style");        // Create a <button> element
+-- 
+2.26.2
+