Opera Firefox

Warning: Firefox now includes downgrade protection to prevent corruption of user profile data. If you install an older version, you'll be prompted to create a new Firefox profile.

If there is a problem with a new version of Firefox, some people may want to downgrade Firefox to a previous version but we do not recommend this. The latest Firefox version includes security updates so downgrading to an older version leaves you more vulnerable to attacks and usually doesn't fix the problem. This article gives you some alternatives to downgrading and links to older versions of Firefox if you do choose to downgrade.

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Problems with an update are usually not caused by the new version of Firefox, but rather the update process. In most cases, installing a previous version will not help. Instead, see:

Note: Other problems can be solved with the Refresh Firefox feature. It restores Firefox to its default state while saving your essential information.

Ensure all security and security-related software is fully updated. Some security software will need to be upgraded to a new version so that it is compatible with each Firefox version update.

Optional software bundled with security software also may need updating. Such software may not be essential for your security but, if outdated, may interfere with the use of Firefox or cause Firefox to crash.

If you still want to downgrade, you can visit Mozilla's directory of older Firefox versions using the links below. Please note, however, that using older versions can make Firefox insecure and more vulnerable to attacks and scams. We recommend that you always use the newest version of Firefox.
Warning: Old Firefox versions pose a significant security risk.
  • Firefox 77.0.132-bit (US English)
  • Firefox 77.0.164-bit (US English)
  • Firefox 77.0.132-bit (US English)
  • Firefox 77.0.164-bit (US English)
  • Firefox 78.0.232-bit (US English)
  • Firefox 78.0.264-bit (US English)
  • Firefox 78.0.232-bit (US English)
  • Firefox 78.0.264-bit (US English)
  • Firefox 79.032-bit (US English)
  • Firefox 79.064-bit (US English)
Firefox
  • Firefox 79.032-bit (US English)
  • Firefox 79.064-bit (US English)
  • Firefox 80.0.132-bit (US English)
  • Firefox 80.0.164-bit (US English)
Opera firefox chrome
  • Firefox 80.0.132-bit (US English)
  • Firefox 80.0.164-bit (US English)
  • Firefox 81.0.232-bit (US English)
  • Firefox 81.0.264-bit (US English)
  • Firefox 81.0.232-bit (US English)
  • Firefox 81.0.264-bit (US English)
  • Firefox 82.0.332-bit (US English)
  • Firefox 82.0.364-bit (US English)
  • Firefox 82.0.332-bit (US English)
  • Firefox 82.0.364-bit (US English)
  • Firefox 83.032-bit (US English)
  • Firefox 83.064-bit (US English)
  • Firefox 83.032-bit (US English)
  • Firefox 83.064-bit (US English)
  • Firefox 84.0.232-bit (US English)
  • Firefox 84.0.264-bit (US English)

Firefox Opera Chrome

  • Firefox 84.0.232-bit (US English)
  • Firefox 84.0.264-bit (US English)
  • Firefox 85.0.232-bit (US English)
  • Firefox 85.0.264-bit (US English)
  • Firefox 85.0.232-bit (US English)
  • Firefox 85.0.264-bit (US English)
  • Firefox 86.0.132-bit (US English)
  • Firefox 86.0.164-bit (US English)
  • Firefox 86.0.132-bit (US English)
  • Firefox 86.0.164-bit (US English)
  • Firefox 87.032-bit (US English)
  • Firefox 87.064-bit (US English)

Opera Firefox Sync

  • Firefox 87.032-bit (US English)
  • Firefox 87.064-bit (US English)
Important: By default, Firefox is set for automatic updates. To prevent Firefox from automatically updating itself after you install an older version, you'll need to change your Firefox update settings: In the Menu bar at the top of the screen, click Firefox and select Preferences.Click the menu button and select ... In the General panel, go to the Firefox Updates section.

Instead of downgrading to an older, insecure version of Firefox and changing your update settings, you should consider these alternatives:

Install Firefox Extended Support Release.Firefox Extended Support Release (ESR) is an official version of Firefox developed for large organizations such as universities and businesses. Firefox ESR does not come with the latest features, but it does have the latest security and stability fixes. For more information, see the article Switch to Firefox Extended Support Release (ESR) for personal use.

Use the latest version of another browser. If you are not satisfied with the current Firefox version or it simply is not working right now, there are alternative browsers that you can use to browse the web.

I'll admit, I was a die hard Internet Explorer user. I hated the idea of people telling me I should switch browsers because of 'tabs' instead of windows. It worked fine for me, and I was able to surf the web and get what I needed done. Eventually, I wanted to see what all the hype was about, so I tried out Firefox. I was slightly overwhelmed, and spent a couple minutes looking through and changing the options. After awhile, I stuck with Firefox, based on its extensions, like some that can help you not waste time on certain websites and an easy bookmark bar located under the address bar, for quick access to my mainly visited sites. However, Firefox is not for everyone. I had to try several VPN services for Firefox to visit some abroad websites without lags. There are advantages and disadvantages to the three web browsers Internet Explorer, Firefox, and Opera.


Opera seems to load pages somewhat quicker than Firefox. The download manager has more options and better viewing on Opera, and can keep track of torrents at the same time. Firefox and Internet Explorer can load flash movies and animated .gifs at about an equal speed. Opera is somewhat buggy with animations. The movies sometime lags and animated pictures in Opera move very slow compared to the other two browsers. Firefox seems to be a more heavyweight browser, as shown in the next example.


Another factor to consider is how much system resources your browser is using. On a blank homepage, the following is how much memory each browser uses:

Internet Explorer 6: 2052 K
Firefox 1.5: 30484 K
Firefox 2.0: 30552 K
Opera 9: 4580 K
Winner: Internet Explorer

Internet Explorer and Opera use a small amount of memory on a computer, and performance would most likely not decrease noticeably. Firefox, however, can use up a lot of system resources and slow down other applications. Of course, these numbers are taken while the browser is on a blank home page, memory usage increases greatly depending on how many tabs and windows are open and the sites you are viewing.

Opera Firefox Chrome Safari


  • IE 7 features tabbed browsing as do the other browsers.
  • Many users have not upgraded to IE 7 and continue to use IE 6.
  • Microsoft is currently distributing add-ons for IE.
  • The choices are somewhat limited and some of the extensions actually cost money.
  • IE is the most used browser, websites are generally forced to support it correctly.
  • Since IE is most popular, it is the most targeted for exploits.

Opera Firefox


Opera Firefox Download

  • Supports a wide range of free extensions on the Mozilla website
  • Sometimes updates aren't always improvements and extensions refuse to run on some versions.
  • Firefox makes up around 30% of browsers used today, so more sites will support it.
  • More sites will also target it for exploits now that is has become more popular.
  • Features adblock extension that will eliminate most advertisements on sites.
  • Many popups can still get around the Firefox built-in popup blocker. The most effective popup blocker is on Opera.

  • Opera supports the flash plugin better on AMD64 linux systems than firefox.
  • Built-in feature that will download torrents.
  • There are only basic options for downloading the torrents, most bittorrent clients are better.
  • Opera is one of the most secure browsers because it has a smaller userbase, so it is less targeted.
  • Some sites will have problems supporting Opera because of its small popularity.
  • Many of the extensions for Firefox are built-in features on Opera.
  • There are more options for Firefox with extensions. Although Opera has widgets, they have little use.

Opera Firefox Explorer

Picking the right browser can be a tough choice to make. I would suggest Opera if you want to have a fast, light-weight browser for just general surfing, instead of Internet Explorer. I currently use Firefox and Opera together. I use Firefox for general browsing and Opera for viewing flash content. Keeping your site online is important too, you can read the guide here on how to check if a website is down. There's also another less known browser called Tor, which is a privacy-focused alternative for the 3 mentioned above.