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A crash is what happens when Firefox closes or quits unexpectedly. After a crash, you should see the Mozilla Crash Reporter appear. This article will help you fix crashes and show you how to get more help if you"re having difficulties.
Note: If Firefox is open but won"t respond to any of your actions, then this is a hang, not a crash. See Firefox hangs or is not responding - How to fix for solutions.
If Firefox crashes at startup:
Otherwise, follow these steps in order.
Table of Contents
Update your software
The crash you"re experiencing may have already been fixed in a new version!
Update Firefox
Every Firefox release includes a number of fixes for crashes that people have reported. Making sure you have the latest version may fix your crash. See Update Firefox to the latest release for details.
Update and troubleshoot your Flash plugin
Update Windows
Update macOS
Make sure your Mac has all of the latest security and stability fixes.
Update Linux
Make sure you have all of the latest security and stability fixes.
Update your drivers
Check if your graphics drivers are up-to-date. For more info, see Upgrade your graphics drivers to use hardware acceleration and WebGL.
If your crash happens while printing, check that your printer driver is up-to-date by going to your printer manufacturer"s support website.
Update your Internet Security software
Make sure you have the latest version of your Internet security software (including firewalls, antivirus programs, anti-spyware programs, and more).
Check for viruses or spyware
A number of different viruses and spyware are known to crash Firefox. For more information, see Troubleshoot Firefox issues caused by malware.
Check to see if the crash happens in Safe Mode
If updating software didn't work or if Firefox crashes on startup, use the steps below to test whether the crash happens in Firefox Safe Mode or not and then follow the instructions in the recommended articles.
The crash doesn't happen in Safe Mode
If your crash doesn't happen in Safe Mode, it is most likely because an extension, theme or hardware acceleration is causing the crash.
- Follow the steps in Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems to determine the cause.
Check your hardware
Check your RAM for errors
If Firefox crashes repeatedly, check your RAM for errors using for instance the following tool, Memtest86+Rember.
Get help fixing this crash
Figuring out the cause of a crash can be difficult. If you"ve tried the steps above and can"t get Firefox to stop crashing, the instructions below will show you how to get the crash Report IDs for your most recently submitted crash reports, so our volunteers can help you.
If you can open Firefox, at least in Safe Mode:
Note: If you can"t open Firefox because it crashes at startup even in Safe Mode, use these alternative instructions to locate Report IDs:
Ask for help in the Community Support forum
- Click this link to ask for help with your crash.
Note: This link is only valid for help with crashes.
- You may need to create an account or log in to your existing account during the "ask a question" process.
- Fill out the Details section of the next page with as much information you have about the crash. Include any of the steps you completed above, like updating Firefox or testing for the crash in safe mode.
- Copy the long Report ID number you"ve got above for the latest crashes ( bp-…) and paste it into the "Details" section.
- Finally, click the Post Question button.
A crash is what happens when Firefox closes or quits unexpectedly. After a crash, you should see the Mozilla Crash Reporter appear. This article will help you fix crashes and show you how to get more help if you"re having difficulties.
Note: If Firefox is open but won"t respond to any of your actions, then this is a hang, not a crash. See Firefox hangs or is not responding - How to fix for solutions.
If Firefox crashes at startup:
Otherwise, follow these steps in order.
Table of Contents
Update your software
The crash you"re experiencing may have already been fixed in a new version!
Update Firefox
Every Firefox release includes a number of fixes for crashes that people have reported. Making sure you have the latest version may fix your crash. See Update Firefox to the latest release for details.
Update and troubleshoot your Flash plugin
Update Windows
Update macOS
Make sure your Mac has all of the latest security and stability fixes.
Update Linux
Make sure you have all of the latest security and stability fixes.
Update your drivers
Check if your graphics drivers are up-to-date. For more info, see Upgrade your graphics drivers to use hardware acceleration and WebGL.
If your crash happens while printing, check that your printer driver is up-to-date by going to your printer manufacturer"s support website.
Update your Internet Security software
Make sure you have the latest version of your Internet security software (including firewalls, antivirus programs, anti-spyware programs, and more).
Check for viruses or spyware
A number of different viruses and spyware are known to crash Firefox. For more information, see Troubleshoot Firefox issues caused by malware.
Check to see if the crash happens in Safe Mode
If updating software didn't work or if Firefox crashes on startup, use the steps below to test whether the crash happens in Firefox Safe Mode or not and then follow the instructions in the recommended articles.
The crash doesn't happen in Safe Mode
If your crash doesn't happen in Safe Mode, it is most likely because an extension, theme or hardware acceleration is causing the crash.
- Follow the steps in Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems to determine the cause.
Check your hardware
Check your RAM for errors
If Firefox crashes repeatedly, check your RAM for errors using for instance the following tool, Memtest86+Rember.
Get help fixing this crash
Figuring out the cause of a crash can be difficult. If you"ve tried the steps above and can"t get Firefox to stop crashing, the instructions below will show you how to get the crash Report IDs for your most recently submitted crash reports, so our volunteers can help you.
If you can open Firefox, at least in Safe Mode:
Note: If you can"t open Firefox because it crashes at startup even in Safe Mode, use these alternative instructions to locate Report IDs:
Ask for help in the Community Support forum
- Click this link to ask for help with your crash.
Note: This link is only valid for help with crashes.
- You may need to create an account or log in to your existing account during the "ask a question" process.
- Fill out the Details section of the next page with as much information you have about the crash. Include any of the steps you completed above, like updating Firefox or testing for the crash in safe mode.
- Copy the long Report ID number you"ve got above for the latest crashes ( bp-…) and paste it into the "Details" section.
- Finally, click the Post Question button.
A fall Occurs when Firefox closes or quits unexpectedly. After this you should see a Mozilla crash message. This article will help you eliminate falls and show you how to get help if you have problems.
If Firefox crashes on startup:
IN otherwise, follow these steps in order.
Update your software
It is possible that the falls you are experiencing have already been corrected in new version!
Update Firefox
Update your plugins
Make sure you have the latest versions of all your plugins installed.
- Go to our Plugin Check page and click on the links to update any plugins that are out of date.
Update Windows
- Go to the Start menu, open All Programs and select Windows Update.
Update OS X
Make sure you have all the latest security and stability patches installed.
- Go to the Apple menu and select Software Update...
Update Linux
Make sure you have all the latest security and stability patches installed.
- Go to the System menu, then down to Administration and select Update Manager.
Update your drivers
If your crash occurs while printing, make sure you have current version driver by going to the printer manufacturer's support website.
Update your Internet security programs
Make sure you have the latest versions of Internet security software (including firewalls, antivirus programs, anti-spyware programs, and more).
Check for viruses or spyware
Various viruses and spyware are known to crash Firefox. To make sure that your system is not infected with spies and viruses, install and run these programs, first updating their anti-virus databases:
Check if the crash occurs in Safe Mode
If updating the software did not help or if Firefox crashes on startup, follow the steps listed below to check whether Firefox crashes in Safe Mode or not, and then follow the instructions in the recommended articles.
Crash does not occur in Safe Mode
If your crash does not occur in Safe Mode, it is most likely caused by an extension, theme, or hardware acceleration.
- Follow the steps in Troubleshoot extensions, themes, and hardware acceleration for common Firefox issues to determine the cause of the crash.
Check your equipment
Check your RAM for errors
If Firefox keeps crashing, check your RAM for errors using, for example, a program Memtest86+Rember.
Getting Help Resolving This Fall
Determining the cause of a fall can be difficult. If you've already tried the steps above and are unable to resolve Firefox crashes, the steps below will show you how to collect information about your crash so our volunteers can help you.
When working in a browser, the function of saving and later restoring tabs can be very useful. Mozilla Firefox is one of the leading web browsing applications and developers are working tirelessly to improve it. However, Firefox still crashes. That’s why it’s so important to know how to restore tabs in Mozilla.
Settings for restoring tabs to default
If Firefox has all the default settings, after crashing or restarting the browser, you may simply end up on the home page, so you will not be able to open and restore data.
To set a rule to restore previous session, which opens tabs that were active in the last session:
When you close your browser and return to it, you will see all the tabs you were working with before closing. And if Firefox crashes, you will see a pop-up frame asking you to restore your previous session.
How to restore tabs in Firefox via History
If session recovery is correctly configured in the browser, when restarting, all tabs can be launched through the “Journal” located on the main menu panel. If the history of your visits and open pages is saved, either the “Restore previous session” option or the “Recently closed tabs/windows” drop-down menu will be active. Through this menu, for example, you can open the last closed Firefox tab.
How to restore closed tabs in Mozilla through synchronization
If you need to restore tabs in Firefox that were open on another device, there is a synchronization feature for this.
How to Recover Firefox Tabs via Session Manager
Session Manager is an official browser plugin that not only helps Firefox recover closed tabs, but also makes it easier to save and catalog them. Thanks to it, you can create registries with specific sessions and open them at any time upon request. Without it, it is impossible to restore tabs in Mozilla from previous sessions. It also helps to retrieve accidentally closed pages from history.
To install the addon, go to your browser and hold down Ctrl+Shift+A or type the request about:addons into the address bar. A menu will open to search for add-ons.
Here, search for add-ons, find Session Manager and install. The application works fine without restarting the browser.
The addon has a fairly flexible system of settings for saving sessions, so you can easily use it to restore a closed tab in Mozilla. The Session Manager extension archive can store up to 30 browser sessions.
How to Recover Closed Tabs in Firefox via System Files
If the browser contained the data you needed, to be on the safe side, it is better to save this file in a separate folder to restore the information.
To prevent the question of how to return a closed tab in Mozilla when you next open the browser, you must not allow the sessionstore to be overwritten. You can find it in the user profile on the device:
- In Windows 7 and higher, in the directory C:\Users\User\AppData\Roaming\Mozilla\Firefox\Profiles\***.default. A folder with the default extension can have any numbers and letters in its name. Here Current state session and is saved in sessionstore.js, as well as in the sessionstore-backups folder;
- On Mac OS: ~/Library/Mozilla/Firefox/Profiles/;
- On Linux OS: ~/.mozilla/firefox.
When deciding how to restore a closed tab in Mozilla, the browser accesses the sessionstore.js file. And when it is missing or damaged, an empty tab opens instead of the desired session. When you open the sessionstore-backups folder, you can see the files recovery.js, recovery.bak, previous.js. All of them store the state of the Internet browser at a certain moment. Take any of them, rename them to sessionstore.js and place them in the main Profiles folder. The chance of successfully restoring a closed Firefox tab is very high.
When carrying out such operations, be sure to keep backup copies of all files used.
IN general situation the following happened. I bought a new laptop with the Windows 7 operating system, 64-bit. The default browser was Internet Explorer, and so I decided to install my usual Firefox. I did everything according to the standard scheme, I go to the official website and download the latest version of Firefox, at that time it was Firefox 10. Everything downloads fine, I install it and launch it.
After launching, I start using it, open a new tab, and just Mozilla crashes, shows error. At first I thought it was just some kind of one-time glitch, and of course I try again, but the situation repeats itself.
And so it is with me Firefox keeps crashing. Moreover, I note that on the second laptop, which has Windows 7, 32-bit Firefox works perfectly, and has never frozen. But I’m stubborn, I’m starting to experiment. I download the old version of Firefox 4.0 - the error repeats, Mozilla crashes. I install Mozilla Firefox 3.6 - it works stably. This is how I worked on the old version for a long time and didn't update.
Solution
But in fact, the solution to the problem turned out to be much simpler than I expected. Again, using the random method and experimentation, I tried a lot of things, but I had to do the following.
I found the browser launcher file in the program folder through the properties of the firefox shortcut.
Thus, I got into the program folder and immediately found the launching file firefox.exe.
Then I right-clicked on this file, and on the “Compatibility” tab I checked the box next to the inscription: “ Run the program in compatibility mode:". Next, in the drop-down list, I selected Windows XP (Service Pack 3) and clicked the Apply button.
After these actions my Mozilla Firefox browser no longer crashes, crashes, or produces errors. Now I have Firefox version 13.0 installed and everything works great, it is updated on Windows 7 64-bit.
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If you are an active user of the World Wide Web, you have probably encountered the fact that suddenly, for no reason at all, your browser starts to slow down. Unfortunately, not a single web browser is immune from this, so there are no exceptions for anyone. Of course, developers exist to avoid and eliminate such errors, which is why updates are released quite often, in particular, I mean Mozilla now.
However, there are some circumstances that depend on the user himself, and because of these, problems may also arise. Accordingly, everyone can influence the work of their favorite browser, making it better and faster. So, if it’s not a system error, but Firefox is very slow, it means that, without meaning to, you contributed to this slowdown. Let's take a closer look at the situation.
What is the reason
Firefox began to slow down, which means you need to understand what the reason is. You can wait a long time for an update from the developers, in the meantime, incorrect operation of the browser is annoying, so now I will try to determine all the possible reasons for this incident.
For comprehensive quality work Browser requires plugins and extensions. And imagine that you regularly download this or that add-on, they accumulate and accumulate on your computer. Over time, you forget about some of them, however, each time the system spends its “effort” to launch them.
Another one possible reason What slows down mozilla firefox is the large amount of saved history of visiting sites. Along with the latter, cookies, cache and other information are stored, which need to be disposed of from time to time. We have already described how, cache and cookies, in other articles.
Solution
After completing at least one step, you will see that your browser begins to work better. That is why, even for preventive purposes, it is so important not to forget to get rid of things on your computer that could lead to problems.
Hello, Dear friends! Today we will look at a very common problem with such a well-known browser as Mozilla Firefox. So!
Despite the fact that most of you have fairly strong hardware, nevertheless, the work of the Mozilla Firefox browser has not become any better. in simple language Browser slows down Mozilla. Well, it’s not at all about the power of your computer, to be honest. It's just that the developers of this software constantly stuff it with all sorts of unnecessary crap. By the way, just pay attention to the number of various “gadgets” that are installed in the browser and you will understand everything yourself. And if you take into account the fact that more than two-thirds of these “gadgets” you don’t need at all, then what kind of browser speed can we talk about?! It's because of them Firefox is slow. But let's talk about everything in more detail.
First, the loading speed of the browser itself is affected by things like plugins and extensions. They just eat up a large “piece” of time that the system spends on sorting and launching all these add-ons. To speed up your Firefox, you need to disable everything unnecessary; this will speed up the work and the browser will not work to brake. This is why we do this.
Launch the browser and click on the “Tools” - “Advanced” tab. A separate Manage Add-ons page will open. Here you will see several items: “Get add-ons”, “Extensions”, “Plugins” and “Appearance”. First open the “Extensions” item and disable everything there: all sorts of “Yandex. bars", "Mail. ru” and other crap that was installed “by default” by your browser.
Next, go to the “Plugins” item. How many of them do you see here?! Ten? One and a half? Now imagine how much time is spent loading all this junk?! Disable everything except Shockwave Flash: this plugin is necessary so that you can watch videos online. Close the page and browser and move on.
Now move the cursor over the browser icon on the “Desktop” and right-click. In the context menu that pops up, select the bottom line - “Properties” - and left-click on it. The Properties: Mozilla Firefox window will open. Here you will see several tabs - click on the “Shortcut” tab (although, by default, the window itself opens on this tab).
Now look: in this tab there is a field “Object”, and an address is written in it, like “”C:\Program Files\Mozilla Firefox\firefox.exe”. Your task: immediately after the quotes, add the word /Prefetch 1 and click “OK”. Close the window and launch Mozilla Firefox. Now, when you start the browser, the system will automatically add necessary information to the “Prefetch” folder and will speed up its launch.
On at this stage slow down the browser should not. So, now all that remains is to speed up minimizing and expanding the browser window. To do this, here's what you need to do: running browser, in the dialog line, enter the command about:config and press “Enter”. You will see a message with a button “I promise I will be careful” - click on it.
Now you see a bunch of parameters. On some empty space right-click the fields. A menu will appear in which you select the items “Create” - “Logical”. A separate small “New Value (Boolean)” window will appear. In this window there will be only one field “Enter the name of the setting.”
Enter the following parameter: config.trim_on_minimize(copy the command directly from here and paste it into the field).
Click “Ok” and select “false” and “Ok” again.
Reboot the computer and voila! - the browser works like a clock. Not Swiss, of course, but nevertheless slow down the browser will not be! Happy setup!
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In general, the situation is as follows. I bought a new laptop with operating system Windows 7, 64-bit. The default browser was Internet Explorer, and so I decided to install my usual Firefox. I did everything according to the standard scheme, I go to the official website and download the latest version of Firefox, at that time it was Firefox 10. Everything downloads fine, I install it and launch it.
After launching, I start using it, open a new tab, and just Mozilla crashes, shows error. At first I thought it was just some kind of one-time glitch, and of course I try again, but the situation repeats itself.
And so it is with me Firefox keeps crashing. Moreover, I note that on the second laptop, which has Windows 7, 32-bit Firefox works perfectly, and has never frozen. But I’m stubborn, I’m starting to experiment. I download the old version of Firefox 4.0 - the error repeats, Mozilla crashes. I install Mozilla Firefox 3.6 - it works stably. So I worked for old version I haven't updated for a long time.
Solution
But in fact, the solution to the problem turned out to be much simpler than I expected. Again, using the random method and experimentation, I tried a lot of things, but I had to do the following.
I found the browser launcher file in the program folder through the properties of the firefox shortcut.
Thus, I got into the program folder and immediately found the launching file firefox.exe.
Then I right-clicked on this file, and on the “Compatibility” tab I checked the box next to the inscription: “ Run the program in compatibility mode:". Next, in the drop-down list, I selected Windows XP (Service Pack 3) and clicked the Apply button.
After these actions my Mozilla Firefox browser no longer crashes, crashes, or produces errors. Now I have Firefox version 13.0 installed and everything works great, it is updated on Windows 7 64-bit.