Yesterday I installed the latest download of Firefox for Mac. It appears that I cannot visit any website, because I always get the message that the certificate is issued by an unknown authority. I spent most of the day finding a solution and am fed up now with Ff. I found many help pages, suggesting to remove cert8.db when Ff is closed, to reset Ff and several other solutions. I tried them all but nothing worked. No Web page has a valid certificate according to Ff. I am well acquainted with Ff. I have used it for years on Windows, Linux and Android and never had problems of this kind. I'm am using Osx 10.10.3 (rolled out yesterday, April 9 2015 with the latest available Ff for Mac. (27.0.1)After spending a whole day at pointless troubleshooting only one question remains: Is Ff for Mac not compatible with the brand new Osx 10.10.3?Thanks.Rene Hasekamp.
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This article explains how to download and install Firefox on a Mac.
- If you are updating from a previous version of Firefox, see Update Firefox to the latest release.
- Visit the Firefox download page in any browser (for example, Safari). It will automatically detect the platform and language on your computer and recommend the best version of Firefox for you.
- Click .
- Note: If you want to have a choice of the language for your Firefox installation, click the Download options and other languages link instead.
- Once the download has completed, the file (Firefox.dmg) may open by itself and pop open a Finder window containing the Firefox application. Drag the Firefox icon on top of the Applications folder in order to copy it there.
- Note: If you do not see this window, open the Firefox.dmg file that you downloaded.
- After dragging Firefox to the Applications folder, hold down the control key while clicking in the window and select Eject 'Firefox' from the menu.
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Tip: You can add Firefox to your dock for easy access. Just open your Applications folder and drag Firefox to the dock.
Firefox is now ready for use. Just click on its icon in the dock or Applications folder to start it.
When you first start up Firefox, you will be warned that you downloaded Firefox from the Internet. Because you download Firefox from the official site, click .
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Upon installation, Firefox will not be your default browser, which you'll be notified about. That means that when you open a link in your mail application, an Internet shortcut, or HTML document, it will not open in Firefox. If you want Firefox to do those things, click . If you're just trying out Firefox or simply do not wish to set Firefox as your default browser, click .