(If you want to restore your previous non-private session, use History > Restore Previous Session.) Pause while Firefox finishes its cleanup, then rename pluginreg.dat to something like pluginreg.old Firefox > Quit (on Windows: File menu > Exit).Leaving that window open, switch back to Firefox and Quit/Exit, either: In the first table on the page, click the "Show in Finder" button (on Windows: the "Show Folder" button) to launch a new file manager window showing your settings files. type or paste about:support in the address bar and press Enter/Return.Help menu > Troubleshooting Information."3-bar" menu button > "?" button > Troubleshooting Information.Open your current Firefox settings (AKA Firefox profile) folder using either You can remove it and have Firefox re-scan for plugins. Sometimes the pluginreg.dat file becomes corrupted. If Firefox is set to scan but still does not find the plugin and list it on the Add-ons page. If you check the Add-ons page, Plugins section again, can you find the missing plugin there now? If you changed this setting, quit and restart Firefox to trigger another scan. (3) If is not set to its default value of true, double-click it to toggle it back to the default. (2) In the filter box, type or paste scan and pause while the list is filtered Click the button promising to be careful. (1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Here's how to check and fix that (this is based on Windows but probably is similar on Mac): Here are the steps to check those possibilities:Ĭonfirm that Firefox is scanning for plugins Another is that Firefox's settings file storing plugin data has become corrupted. One possible reason for an installed plugin not to appear on the Add-ons page is if Firefox has been set NOT to scan for plugins. I don't know if the issue is QuickSync support or not, but if you ask Netflix support about problems with using HTML5 playback on Yosemite, they will tell you that it is only supported on Macs with Sandy Bridge CPUs or later (so, no support on Core 2 Duo models).It shows up on Safari? That's a good sign. So it would be nice if Apple allowed for Safari to fallback to a software decode engine in the event that a Sandy Bridge CPU is not present, since the experience is still way nicer than the Silverlight-based player. Even so, CPU usage while watching Netflix in Chrome with HTML5 is way lower than using Silverlight on the same machine. This appears to be an Apple/Safari limitation, since Netflix also supports HTML5 playback in recent versions of Chrome, and you can install Chrome for Mac on any model of Mac running any supported version of OS X, and HTML5 playback will work just fine (tested on a 2010 C2D MacBook Air running Mavericks that has no Silverlight installed).īest guess: Apple is doing some part of the decoding (either video or encryption, or possibly both?) in hardware, while Chrome is doing it entirely in software. Click to expand.I don't know if the issue is QuickSync support or not, but if you ask Netflix support about problems with using HTML5 playback on Yosemite, they will tell you that it is only supported on Macs with Sandy Bridge CPUs or later (so, no support on Core 2 Duo models).
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