{"id":7326,"date":"2014-12-18T14:23:11","date_gmt":"2014-12-18T22:23:11","guid":{"rendered":"http:\/\/blog.mozilla.org\/addons\/?p=7326"},"modified":"2015-01-13T11:45:14","modified_gmt":"2015-01-13T19:45:14","slug":"compatibility-for-firefox-35","status":"publish","type":"post","link":"https:\/\/blog.mozilla.org\/addons\/2014\/12\/18\/compatibility-for-firefox-35\/","title":{"rendered":"Add-on Compatibility for Firefox 35"},"content":{"rendered":"<p>Firefox 35 will be <a href=\"https:\/\/wiki.mozilla.org\/RapidRelease\/Calendar\">released<\/a> on January 13th. 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\/35\">Firefox 35 for Developers<\/a>, so you should also give it a look.<\/p>\n<h3>General<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1001090\">Implement ES6 &#8220;temporal dead zone&#8221; for let<\/a>.<\/strong> If your add-on is affected by this, you were likely contacted by us before about this, since it affected many add-ons and caused their scripts not to work at all. This is due to certain types of redeclaration using <em>let<\/em> that weren&#8217;t detected before. There&#8217;s an extended discussion about how this <a href=\"https:\/\/groups.google.com\/forum\/#!topic\/mozilla.dev.platform\/tezdW299Zds\">in the newsgroups<\/a>.<\/li>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=407821\">Truncate tag to a maximum length<\/a>. Tags in bookmarks used to have no length restrictions, causing performance problems if they were too long. They are now restricted to to 100 characters.<\/li>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=997124\">Remove DOS encodings that aren&#8217;t Web-exposed<\/a>. A number of old encodings that weren&#8217;t exposed to content have been removed.<\/li>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1063962\">Replace jschar typedef with char16_t<\/a>.<\/li>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1066826\">Remove Navigator::MozisLocallyAvailable API<\/a>.<\/li>\n<\/ul>\n<h3>New!<\/h3>\n<ul>\n<li><a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1039500\">tabbrowser&#8217;s _getTabForBrowser is very slow with lots of tabs<\/a>. The new bit here is that now there&#8217;s a public <code>getTabForBrowser<\/code> function in <code>gBrowser<\/code>, which is also more efficient when there are lots of tabs open. The private form of this function (<code>_getTabForBrowser<\/code>, with an underscore) is deprecated.<\/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 35, I&#8217;d like to know.<\/p>\n<p>The automatic compatibility validation and upgrade for add-ons on AMO will happen soon, so keep an eye on your email if you have an add-on listed on our site with its compatibility set to Firefox 34.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Firefox 35 will be released on January 13th. 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\/2014\/12\/18\/compatibility-for-firefox-35\/\">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":[278877,278873,278876,278858],"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 35 - 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\/2014\/12\/18\/compatibility-for-firefox-35\/\" \/>\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=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.mozilla.org\/addons\/2014\/12\/18\/compatibility-for-firefox-35\/\",\"url\":\"https:\/\/blog.mozilla.org\/addons\/2014\/12\/18\/compatibility-for-firefox-35\/\",\"name\":\"Add-on Compatibility for Firefox 35 - 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