Firefox Support Forum

I'm using 107.0.1 vers. At this link it states: https://support.mozilla.org/en-US/kb/view-pdf-files-firefox-or-choose-another-viewer#w_use-a-different-pdf-viewer-for-downloaded-pdf-files

Disable the built-in PDF viewer and use another viewer

You can also set a different third-party PDF viewer to handle PDF files, instead of Firefox’s built-in PDF viewer. To switch from using the built-in PDF viewer to another viewer: 1. Click the menu button and select . 2. In the panel, go down to the Applications section. (SO WHERE IN THE HELL IS THIS SECTION???) YOU CAN'T DO I never selected Mozilla to open any pdf and there's no where to opt out or change based on what all the troubleshooting tips say... All these tips must be located on a much older version of Firefox cause they ain't in my version OR they are hid under some dubious section... Pretty frustrating....when you want to use Adobe and can't cause I'm locked in under Firefox....don't know how that has happened unless it was done automatically under one of the many current upgrades that have been coming down over the last month.

Hi there ! How can i get this type of Tabs? Is it possible? This is so cool ! (Though dark tab ofcourse :D) Example Image Attached...

Thanks Shaer Alvy

On certain websites I am getting scrambled text, mostly in headings and titles, not so much in body text. I have followed several tips from other posts like mine, i.e., installed Open Sans font, but that did not do it. I turned off hardware acceleration, and cleared the cache. The only thing that did work was to start Firefox in troubleshooting mode. I only have two add-ons running, Short URL and Dashlane, I doubt they're responsible for this. Any other ideas?

Hi, I've had Firefox 64 bit running on Windows for a while and recently was given a newer machine where I installed a newer version of the OS. I put the old HDD's as slaves in this new machine. So the old FF is in the slave machine.

I have also installed new Firefox on this new Win10 LTSC, but when I go looking in my now slave HDD I can see FF, but cannot see any bookmarks. Additionally, when I run the FF executable in the old HDD it still runs the new FF, without the old bookmarks.

So how can I extract the old bookmarks on the older FF? Without withdrawing the now slave HDD and making it a master again? As it's now missing most of the OS files too.

Thank you!

Hi there I am having some problems with the browser I have a web base yoga app and there is a lot of you tube videos that just does not play. I disabled my extensions but still nothing. I then installed chrome and the videos worked can you guys please give me an fix.

In the past, when you opened up private browsing, it seamlessly integrated itself into your browser, being indistinguishable. At a glance, no one would know you were private browsing; it blended in.

In a recent update, Mozilla did something unthinkable and made private browsing an isolated instance from Firefox. This, of course, results in a purple flare in the taskbar in front of the entire world that you are private browsing.

I don't understand who thought this was a good idea. I want to know how to undo this horrible change.

See the screenshot where you can't see any information on all my open Firefox windows, except for my private browsing window.

When loading a page from a domain I haven't recently visited, it will almost always return the "Server Not Found - Hmm. We’re having trouble finding that site," error message. If I reload the page, however, it will load. Sometimes I have to reload 2-6 times before it works, but it always eventually succeeds. When it does work, it often times fails to load certain elements like fonts, images, embedded videos, and occasionally whole stylesheets--things that often require calls to third party domain. Again, reloading the page (sometimes multiple times) will cause the page to load properly.

I have already tried:

• Different browsers on same computer (issue does not occur)
• Firefox on different computers with different OS on same network (issue does not occur)
• Cleared cache (issue persists)
• Troubleshooting/safe mode (issue persists)
• Deleted prefs file (issue persists)
• Disabled DNS prefetching (issue persists)

As Title,

Whenever I try to go full screen and hover to the top of the browser, It originally showed all my tabs, but recently it has not been doing that. When I hover over and over, the tabs maybe appear 10% of the time, but whenever I click somewhere else other than the Tab Bar, it disappears.

I think this bug happened ever since I enabled "Hide bookmark toolbar". I have since reverted it back, but the error is still the same. Weird, since my tabs disappear since it has nothing to do with bookmarks.

I've gone down a rabbit hole of authentication in regards to Sync with Firefox. I'm wondering if I can regenerate a recovery key by removing the recovery key from my account and then choosing to re-enable a recovery key on my account? I do have the password for my primary email on my account, but I can't find the recovery key value for it.

I also have a secondary email on my account that I don't have a password for, and need to reset a password for it, but one problem at a time...