{"id":7527,"date":"2015-08-14T13:19:31","date_gmt":"2015-08-14T20:19:31","guid":{"rendered":"http:\/\/blog.mozilla.org\/addons\/?p=7527"},"modified":"2015-09-17T13:02:39","modified_gmt":"2015-09-17T20:02:39","slug":"compatibility-for-firefox-41","status":"publish","type":"post","link":"https:\/\/blog.mozilla.org\/addons\/2015\/08\/14\/compatibility-for-firefox-41\/","title":{"rendered":"Add-on Compatibility for Firefox 41"},"content":{"rendered":"<p>Firefox 41 will be <a href=\"https:\/\/wiki.mozilla.org\/RapidRelease\/Calendar\">released<\/a> on September 22nd. Here&#8217;s the list of changes that went into this version that can affect add-on compatibility. There is more information available in <a href=\"https:\/\/developer.mozilla.org\/en-US\/Firefox\/Releases\/41\">Firefox 41 for Developers<\/a>, so you should also give it a look.<\/p>\n<h3>Extension signing<\/h3>\n<ul>\n<li><del>This is the first version of Firefox that will enforce our new <a href=\"https:\/\/wiki.mozilla.org\/Addons\/Extension_Signing\">signing requirements<\/a>. Firefox 40 only warned about it. 41 will disable unsigned extensions by default. All AMO add-ons have already been signed and we&#8217;re in the process of reviewing non-AMO add-ons.<\/del><\/li>\n<\/ul>\n<p><strong>Update:<\/strong> <a href=\"https:\/\/blog.mozilla.org\/addons\/2015\/09\/16\/extending-the-deadline-for-add-on-signing\/\">the deadline has been extended to Firefox 43<\/a>. The <a href=\"https:\/\/wiki.mozilla.org\/Addons\/Extension_Signing\">wiki page<\/a> should always have the latest information.<\/p>\n<h3>General<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1118285\">Remove the browser.newtab.url preference<\/a><\/strong>.<\/li>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=861219\">Date.prototype should be a non-Date Object<\/a>.<\/li>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1023609\">Remove SpiderMonkey support for let expressions<\/a>. If you&#8217;re unclear about let expressions, you&#8217;re probably unaffected. Nevertheless, <a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/JavaScript\/Reference\/Statements\/let#let_expressions\">here are the docs<\/a>.<\/li>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1150855\">Method definitions require curly brackets<\/a>.<\/li>\n<\/ul>\n<h3>XPCOM<\/h3>\n<ul>\n<li><strong><span id=\"summary_alias_container\"><span id=\"short_desc_nonedit_display\">UPDATE:<a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1159737\"> Stop supporting binary XPCOM components except as part of the application<\/a><\/span><\/span><\/strong>. This was announced for 40, but was later moved to 41. If you have a Firefox add-on that relies on binary XPCOM components, you should <a href=\"https:\/\/blog.mozilla.org\/addons\/2015\/05\/04\/dropping-support-for-binary-components\/\">update your code<\/a> as soon as possible.<\/li>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1162657\"><span id=\"summary_alias_container\"><span id=\"short_desc_nonedit_display\">Turn NewChannel deprecation warnings into assertions<\/span><\/span><\/a>. We have warned about this before, and you can find the <a href=\"https:\/\/hg.mozilla.org\/mozilla-central\/file\/e6b4bb4cc393\/netwerk\/base\/NetUtil.jsm#l287\">documentation of the new interface here<\/a>.<\/li>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1163388\">Get rid of nsIDOMFile<\/a>.<\/li>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1155643\"><span id=\"summary_alias_container\"><span id=\"short_desc_nonedit_display\">Consolidate nsIDebug and nsIDebug2 interfaces<\/span><\/span><\/a>.<\/li>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1172139\"><span id=\"summary_alias_container\"><span id=\"short_desc_nonedit_display\">Convert nsIHttpChannel to builtinclass<\/span><\/span><\/a>.<\/li>\n<\/ul>\n<h3>New<\/h3>\n<ul>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1157561\"><span id=\"summary_alias_container\"><span id=\"short_desc_nonedit_display\">Add webRequest-like API to Firefox<\/span><\/span><\/a>.<\/li>\n<li><span id=\"summary_alias_container\"><span id=\"short_desc_nonedit_display\"><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1157539\">Create &#8220;speed dial&#8221; dynamic home panel layout<\/a><\/span><\/span>. This new layout is available for add-ons in Firefox for Android.<\/li>\n<\/ul>\n<p>Please let me know in the comments if there&#8217;s anything missing or incorrect on these lists. If your add-on breaks on Firefox 41, I&#8217;d like to know.<\/p>\n<p>The automatic compatibility validation and upgrade for add-ons on AMO will happen in the coming weeks, so keep an eye on your email if you have an add-on listed on our site with its compatibility set to Firefox 40.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Firefox 41 will be released on September 22nd. Here&#8217;s the list of changes that went into this version that can affect add-on compatibility. There is more information available in Firefox &hellip; <a class=\"go\" href=\"https:\/\/blog.mozilla.org\/addons\/2015\/08\/14\/compatibility-for-firefox-41\/\">Read more<\/a><\/p>\n","protected":false},"author":173,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[388,44,295],"tags":[278877,278873,278876,278869],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Add-on Compatibility for Firefox 41 - Mozilla Add-ons Community Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.mozilla.org\/addons\/2015\/08\/14\/compatibility-for-firefox-41\/\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jorge Villalobos\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.mozilla.org\/addons\/2015\/08\/14\/compatibility-for-firefox-41\/\",\"url\":\"https:\/\/blog.mozilla.org\/addons\/2015\/08\/14\/compatibility-for-firefox-41\/\",\"name\":\"Add-on Compatibility for Firefox 41 - 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