{"id":8734,"date":"2019-10-10T08:00:19","date_gmt":"2019-10-10T15:00:19","guid":{"rendered":"http:\/\/blog.mozilla.org\/addons\/?p=8734"},"modified":"2019-12-04T13:20:58","modified_gmt":"2019-12-04T21:20:58","slug":"extensions-in-firefox-70","status":"publish","type":"post","link":"https:\/\/blog.mozilla.org\/addons\/2019\/10\/10\/extensions-in-firefox-70\/","title":{"rendered":"Extensions in Firefox 70"},"content":{"rendered":"

Welcome to another round of new additions and changes to extensions, this time in Firefox 70. We have a new API, some improvements on existing APIs, and some great additions to Firefox Developer Tools to make it easier to debug your extensions.<\/p>\n

Network Status<\/h2>\n

Firefox 70 features a new network status API.<\/del> [Edit: It turns out this is not a public API as we determine the best way forward. If we can do this via web standards instead, that would likely be more useful!]<\/em><\/p>\n

Downloads API Improvements<\/h2>\n

We\u2019ve made a few improvements to the downloads API<\/a> in Firefox 70. By popular request, the Referer<\/code> header is now allowed in the browser.downloads.download<\/a> API\u2019s headers<\/code> object. This allows extensions, such as download managers, to download files for sites that require a referrer to be set.<\/p>\n

Also, we\u2019ve improved error reporting for failed downloads. In addition to previously reported failures, the browser.downloads.download<\/a> API will now report an error in case of various http 4xx failures. This makes the API more compatible with Chrome and gives developers a way to react to these errors in their code.<\/del> [Edit: Sorry if I got your hopes up! This is actually coming in Firefox 71!]<\/em><\/p>\n

Privacy API Improvements<\/h2>\n

If you are using the browser.privacy.network<\/a> API and are modifying webRTCIPHandlingPolicy<\/code>, we\u2019ve made some compatibility changes to the disable_non_proxied_udp<\/code> setting. This setting now better matches Chrome\u2019s behavior. If your add-on relied on the Firefox-specific behavior, you can make use of the new setting proxy_only<\/code>.<\/p>\n

Extension Storage Inspector<\/h2>\n

Starting in Firefox 70, Firefox finally supports inspecting data from the browser.storage<\/a> API using the Devtools Storage Inspector<\/a>. When you inspect an add-on via about:debugging<\/code>, you will find a new Extension Storage<\/em> section in the storage panel. While changing the values is not currently supported, this will make debugging your add-ons even easier.<\/p>\n

\"Firefox

Extension Storage Inspector<\/p><\/div>\n

Unsupported Theme Properties<\/h2>\n

The accentcolor<\/code>, headerURL<\/code> and text_color<\/code> properties are now unsupported. Please make use of the replacement properties frame<\/code>, theme_frame<\/code>, and tab_background_text<\/code>. You can find more information on our previous deprecation announcement<\/a>.<\/p>\n

Miscellaneous<\/h2>\n