When prompted, click the Install Firefox plug-in button. A new page opens where you will again be prompted to install. The browser will restart with the installed plug-in. You should be prompted to log in to the host computer (the PC or Mac you are trying to control).
Easily pose as another browser by changing the User-Agent header. Pretending to be a different browser can be useful in a number of different situations:. Some web pages require you to log in or buy a subscription to view their content, but give full read access to search engines. Some web pages determine whether you're using a mobile or desktop browser based on your user-agent.
Some web pages require you to use a specific browser to access their site. And potentially more Note that your browser will not magically morph into a different piece of software just because it's pretending to be some other software.
If a web site locks you out because your browser does not support a feature they require then changing the User-Agent will not make any difference. Also changes navigator.userAgent, as well generating convincing values for several of the other navigator.
properties. – Compatibility with Mozilla's and others By default all WebExtensions are restricted from manipulating any content or requests from (as of Firefox 63) the following domains:. Firefox Accounts:,.
Firefox Addons:,. Firefox Sync:.
Firefox Test Pilot:. Mozilla Help:. Others:, If you really need to change the User-Agent on one of these sites on Firefox 60+ you can search for “ extensions.webextensions.restrictedDomains” in and drop the domains that you require to be modified (eg:, for AMO) from the string pref. Note that doing this will allow all installed extensions to replace extension download links with fake extensions among other things (see for a discussion on why these limitations exist). Additionally sites from the Firefox Addons and Firefox Test Pilot domains mentioned above also have access to the special “Add-on Manager” Web-API, allowing them to do things like enumerating all currently installed browser add-ons and uninstalling them. Since sites with access to this special API may not be manipulated by WebExtensions you'll have to disable this feature as well to override their User-Agents. To do so create a new boolean pref (right-click → New → Boolean) in with name “ privacy.resistFingerprinting.blockmozAddonManager” and value true.
– Translating “User-Agent Switcher” to a new language Any help in translating this extension is greatly appreciated! To do so, simply visit our project on the, create an account and either select an existing language or add a new one to get going. Thanks for helping out! (Alternatively you may submit a on GitLab with the updated translation files or send me the translations using the “Support E-mail”-Address.) – Getting Help Found a bug or want a new feature? Please use the to submit these instead of just mentioning them as part of your reviews. This way it becomes much easier for me to keep track of reported issues and get back to you if additional information is needed to help you. Please note however that “User-Agent Switcher” is mostly in maintenance-only mode now and new features will not be added by me (the primary author, Alexander Schlarb) anymore.
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I'm still open for patches from the community however and would also welcome your support through the linked BountySource buttons under each Feature Request issue in the tracker. – Watching it work If you want to watch User Agent Changer work, there are a few things you could try:. Use a web service (such as or ) to see your currently sent User-Agent header. Use the built-in Network Analyzer (Ctrl-Shift-Q) to view the User-Agent header. Enter navigator.userAgent into the Scripting Console (Ctrl-Shift-K) to view the client-side User-Agent value. There also used to be other information here but it got swallowed when I tried to paste an emoticon into this form Rate your experience.
2 Tips for QuickTime plugin working well in Firefox! QuickTime Plugin is one of the plugins needed for playing a wide variety of multimedia content in web pages. Created by apple as an easy to use player and can be installed across all platforms. All Mac computers have the plugin automatically installed while those using Windows have to download and install the QuickTime plugin on their browsers. Sometimes the plugin may fail to work well on Firefox browser either because it has not been installed properly (an incomplete installation) or not activated while viewing media.
![Net Viewer Plug In For Mac Firefox Net Viewer Plug In For Mac Firefox](/uploads/1/2/5/4/125486596/344716246.png)
Another solution to make QuickTime effective is to re-enable the plugin and restart Firefox. Configure the plugin to be able to automatically open the files to play using QuickTime.
Download QuickTime plugin by heading to the official Apple QuickTime website or click here. Once you have downloaded QuickTime installer, close your Firefox browser. Double click on the QuickTime installer to initiate the installation. Follow the on screen instructions to finish the installation. Launch your Firefox browser.
On the top right corner of the browser, click on the Firefox menu button. Click on Add-ons from the drop down menu.
Locate the QuickTime plugin from the list of plugins. Click on the ‘Ask to Activate’ drop-down box to activate. There you go; we have just finished activating the QuickTime plugin for Firefox!
This is a scenario where you already have QuickTime installed on your computer and the browser still prompts you to update it and by clicking on the ‘update’ link nothing happens (you get the message saying ‘no file download has taken place’). Many users report trying out other browsers to download and it works out well. To sort out this issue, here is what you should do. Remove or uninstall any third party QuickTime importers or exporters from the QuickTime library and Restart QuickTime.
Change the default download directory as follows. Open Firefox browser.
Click on the Tools menu. Select Options to open up the options tab. Under General settings ‘Save files to’, select a folder. Now download QuickTime once again. When the download popup opens, click on ‘Save as’ as quickly as possible. And with that this process is over.