![]() Note that it will overwrite the existing installation if it is of the same channel. Now that you have downloaded a version that you want to try, it is necessary to install that version on your system. You may need to select the right operating system first, and then the language version that you want to install. ![]() Most directories are listed with a date in front so that you can go back easily here. You may want to start with the "latest Mozilla Aurora" or "Latest Mozilla Central" directories and go from there. Firefox Nightly and Aurora: It gets complicated here, as the directory is a mess.Firefox Stable and Beta and ESR: Stable versions are listed by number, while beta versions have bx added to the number with x indicating the version of that particular beta.Here are the links pointing to the various release channels: Probably the best location to download old Firefox versions is the Mozilla ftp server. I highly suggest you download it from the official source, that is Mozilla, and not some third party repository. That's why it is necessary to download that version again from the Internet. It is likely that you do not have the old Firefox installer on your system anymore. You can alternatively use a program like MozBackup for that as well.Go back one directory level and copy the whole profile directory to another location on your system.This opens the profile folder in the system file browser. Click on Show Folder here near the top.Type about:support in the browser's address bar and hit the enter key.If you can start Firefox on your system, do the following to open it: The first thing that you may want to do is back up your Firefox profile. There are however a couple of best practices that I'd recommend you follow before you roll back an update of the browser. Restoring an older version of Firefox is actually not that difficult at all. I ran it from time to time to check for updates, and the latest update today resolved the issue. The core benefit for me was that I could simply switch to Aurora without touching the Nightly version at all. I decided to use Firefox Aurora in the meantime, but the second option would have worked as well. Now that you know where to find old versions of Firefox, you can now go and grab the version that you need and continue your work.It did not, which left me with two options: use a different channel of Firefox in the meantime or go back to the Nightly version that worked just fine. After the installation you should also turn off auto updates if you don't want Firefox to be updated to the latest version in the next update. To download an old Firefox version, simply open the above link in your web browser, find the version that you want to download and install, and then download its files by clicking on the appropriate link.ĭon't forget to completely remove Firefox and any Firefox plugins you have installed, before installing the old version. Though the above link is a FTP directory, it is no longer accessible via a FTP client. ![]() The above link contains all (?) Firefox releases starting from version 0.10.1 up to version 48.0.2, which is the current final production version. You can find the old versions of Mozilla Firefox web browser at the following page: Where to Find and Download Firefox Old Versionsīefore giving the link to Firefox old versions directory, let me warn you one final time that using an old version of any web browser is not a recommended act since it poses security risks, so, you should use it only if you know what you are doing. TIP: If you are a Google Chrome user, you can also find old versions of Chrome. Luckily, Firefox (unlike Chrome) provides an archive of its older versions and makes them available to its users on its FTP directory, which I will be mentioning below. Even if it's not ideal in terms of missing up-to-date features, the possibility of not displaying some websites correctly and potential security risks, if you definitely have to use a certain older version and you are aware of the disadvantages and potential risks, then you should find and install the version you need to use. In such cases, using an older version of your browser is kind of a must. These reasons may range from having problems with a recent update to addon incompatibility with a certain version, testing web layouts and interface functionality and support to certain web applications that you are using. However, it is also important for many of us (especially web designers & developers) to be able to use an older version of the same browser, for a number of reasons. ![]() It is good to know that dozens (even hundreds) of professionals are working really hard to keep the browsers we are using up to date, fully functional and safe. Web browser companies do a great job at constantly keeping their browsers up to date, answering the needs of users in this quickly-evolving Internet and Mobile focused world and reducing security risks of all kinds. ![]()
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