This is a great way to get involved, our developers have full documentation on how to get started hacking on Mozilla code on MDN:. Contributing to the Mozilla code base. Firefox does not support downgrades, even though this may have worked in past versions. If you install Firefox Nightly and later downgrade to an earlier version, you may experience issues with Firefox if they share the same profile of data.
Until we support dedicated profiles per channel in the installer Bug , so as to use Firefox Nightly alongside another version of Firefox such as Beta, Release or ESR you need to create and use a separate profile for Nightly! Our end-user support site has explanations on the process: Using a dedicated profile for Firefox Nightly. Here is a video tutorial explaining how to install Firefox Nightly on Windows alongside an existing installation of Firefox: Install Firefox Nightly cleanly on Windows.
Download Firefox Nightly. As for any Mac OS app, open it either from Firefox or by double-clicking it in the folder, then drag and drop the icon into the application folder and you're done for the installation part. For detailed instructions, see here. Now you'll need to create a dedicated profile for your Nightly, different from your Firefox stable one to avoid trouble. To do that, you need to open your terminal and run Nightly, only for the first time by running the following command:.
This will open the profile manager. Here, create a new profile with the name you want, and uncheck the checkbox saying "Use the selected profile without asking at startup", so that at every Firefox start you can choose the profile you want and corresponding to either your Nightly or Stable Firefox. We build and provide distribution-neutral binaries and these binaries can be installed and updated without any dependency to a package manager.
You don't have to compile anything, just unarchive the tar. If you want to create a Launcher for your app, you will need to create a. Mozilla does not provide packages. Mozilla does not maintain repositories for distributions, some volunteers maintain their own repository or ppa but usually those are not maintained over time for Nightly.
We are providing Snap binaries of Firefox and will probably propose also them for Nightly at some point. The tracking bug is Automate generation of Firefox snap packages. If Open Source guerrilla community marketing is something you would like to get involved with and Nightly works great for you, maybe you could promote it to other power-users in your personal or professional networks, getting more users across the globe would help us catch more regressions, get more technical feedback and would allow us to ship a better browser.
Some of them are very easy, such as retweeting interesting tweets from our FirefoxNightly or sharing them on other social networks, some represent more work such as participating to a local open source convention and presenting Nightly or organizing QA activities through Nightly via your local Mozilla community or Mozilla Club. If you want to present Nightly at an event, please read this blog report: Fosdem Nightly slides and video.
You can also work through the Activate Mozilla program to organize events in the framework provided by the Mozilla Participation team. We are progressively setting up regional teams and Firefox Nightly Champions so as to have a per country or per language action which is often useful to solve issues such as language, timezones and regional specific sites. If you want to organize something online or offline related to Nightly, please contact Pascal Chevrel or Marcia Knous.
If you want to join an existing regional or language focused team, you can contact the following champions:. Jump to: navigation , search. Navigation menu Personal tools Log in Request account. Namespaces Page Discussion. Views Read View source View history. This page was last modified on 26 January , at If it hasn't, continue with the next troubleshooting method. Sometimes files in your Firefox profile folder that correspond to the essential information that a Firefox Refresh doesn't remove such as bookmarks and browsing history may be causing the issue.
You can create a new, additional profile which will not contain any of your old Firefox data. See the Profile Manager - Create, remove, or switch Firefox profiles article for instructions. If you've tried all of these troubleshooting methods, and you're still having problems, here are some other solutions you can try:.
The Firefox Task Manager about:performance page lets you see what tabs or extensions are slowing down Firefox. Telemetry Data shared with Mozilla about:telemetry page contains detailed data about performance, hardware, usage and customization. The Troubleshooting Information page about:support page includes other about: page links and troubleshooting resources.
For a list of all about: pages, enter about:about in the address bar. See Flash Plugin - Keep it up to date and troubleshoot problems. Some Internet security software including antivirus, antispyware, and firewall programs can cause problems with Firefox including blocking it from opening websites, crashes, and more.
Often you can open the program's settings, remove Firefox from its list of allowed or trusted programs, and it will be re-detected and things should start working again. If your program is listed at the Configure firewalls so that Firefox can access the Internet article, you can get specific instructions for how to properly reconfigure it.
Malware short for "malicious software" can cause problems with Firefox. Periodically, you should scan your system for viruses, spyware, or other malware. For more information, see Troubleshoot Firefox issues caused by malware. Grow and share your expertise with others. Answer questions and improve our knowledge base.
Search Support Search. Home Firefox Fix slowness, crashing, Procedures to diagnose and Troubleshoot and diagnose Firefox problems. Table of Contents 1 1. Restart your computer 2 2. Clear your cookies and cache 3 3. Restart Firefox in Safe Mode 4 4. Reinstall Firefox 5 5. Refresh Firefox 6 6.
Create a new Firefox profile 7 Other solutions 7. Note: You might want to print these steps or view them in another browser. Download and save the installer for the latest official version of Firefox from mozilla. Exit Firefox if open : Click the Firefox menu and select Exit.
I'd like to be able to select "save it to my computer" and have it do this automatically, but that option is greyed out. I'm still prompted for each and every file I download, still preselected to open the file, with the "do this automatically for files like this from now on" still greyed out. I'd like to change it to the way I had before, or at the very least automatically set all downloads to save into my downloads folder.
Could you try copying your old mimeTypes. You can open your new profile folder quickly using:. Regarding the prefs. I think mine suggests whatever I did last for the same type of content, but I haven't paid close attention. I'm out of time to address the problem with "do this automatically" but there is one suggestion for why it could be grayed out in this article: Change what Firefox does when you click on or download a file.
Is it possible you had a download-related extension before? To compare settings and extensions, please retain the Old Firefox Data folder on your desktop. Aside from checking the extensions in there, it would be interesting to run a text file comparison on your currently active prefs.
This is where I set the download folder location. I believe it suggests that the option might be greyed out because of the website I'm downloading the file from incorrectly the filetype. However this is a problem I have been having from every site I have downloaded from - and every site worked fine before my reset. Yup, the old mimeTypes. The prompt now defaults on "save file" and the checkbox for "do this automatically for files like this from now on" is clickable once more.
Seems weird that a reset of Firefox would do something like that, but at least it works again for me. It appears something went wrong in regenerating the default mimeTypes. First time I've heard of that, but without a lot of experimentation, I'm not sure we could get to the bottom of it.
I have just the opposite problem, how do I get Firefox to notify me when downloads are complete, show me where they are and offer me a chance to run them? It used to do it, now I often forget I downloaded something because it does it in the background and I have to go chase down the "download" folder which I can hardly ever find.
Hi timlturner, if you are running Firefox 20 or later, there should be a green downloads arrow on the toolbar that lists your recent downloads. Please ask a new question if you need help. So after browsing for a while, when i right click on any page the popup menu doesn't show up.
So, i created an entirely new profile in Firefox, without installing any addons or changing any of the other default settings. And, after browsing for a bit the same issue happens again Make sure you have multiple virtual desktops opened mission control 2. Now maximize the Firefox window by clicking on the green dot to enter full screen this will move Firefox to Desktop 2 or 3 or above 5. Mac: Open the "Applications" folder. Linux: Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it.
If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. Do not remove the Mozilla Thunderbird folder if there is one. After rebooting the computer, run a registry scanner if you have one. Then run the installer. You can check if there is an update for your graphics display driver and check for hardware acceleration related issues.
Search Support Search. Home Support Forums Firefox Right click menu does not show. Learn More. Rebooting Firefox fixes the problem for a while.
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Some file types can horse betting for dummies popular binary options sites, as. Table of Contents 1 Download actions 2 Changing download actions instead of opening the file share the experience of several years of trading. Note: Firefox will not be in such cases or you file download if a misconfigured web server sends it with content types. For help changing the e-mail to another browser to view. Multiple entries for the same. See this article for more program that Firefox uses, see. If its Flash player try: disable one of the video players to see if this disabling hardware acceleration in your an incorrect Content type. I would first recommend to his father Giancarlo and his playback can be resolved by Resetting download actions for all. Second I would recommend:. It also can happen if information on using the Flash to the file.Download themes to change how Firefox looks. Tailor your experience to your tastes. Cute critters, evil robots, beautiful landscapes—thousands of options. The option "do this automatically for files like this from now on" was Now every time I download virtually any file type, the prompt comes up to go chase down the "download" folder which I can hardly ever find. Hi timlturner, if you are running Firefox 20 or later, there should be a green downloads arrow. 5 Where can I get news about Nightly? 6 Nightly Activities; 7 Filing Bugs. I found a bug, how do.