Firefox 社群討論區

Adding this post for SEO indexing purposes, as I cannot reply to the original archived one: https://support.mozilla.org/en-US/questions/1321170

The original post is one of the top search engine results, and provides a bandaid solution, without addressing the proper root cause, so I want to help whoever stumbles over this.

Original problem:

Dale 1/9/21, 8:26 AM

Firefox Developer Edition 85.0b4, macOS 10.15

If I Google for a PDF and click a link, I get the Firefox download dialog. If I select "Open with Firefox [Developer Edition]", the following things happen:

   The PDF is downloaded to ~/Downloads
   The PDF is opened in a new tab, with that new tab's location bar holding a file:///... URL to the downloaded PDF 

What I would instead like to happen is:

   The PDF is downloaded to some temporary directory where I won't have to worry about deleting it manually
   In whatever tab the PDF is displayed in, the location bar contains the URL where the PDF was (temporarily!) downloaded from 

How can I achieve this?

Not having the URL where a PDF was opened from is very annoying when, for example, I open a bunch of PDF search results to read and review, and I later want to share links to some of those PDFs. Best I can do to find their URLs to give to others is then to try and remember which tab corresponds to which search result, or do mine the downloads tab.

Contrast this with Chrome: I click a Google result for a PDF and the PDF just opens in the current tab with the URL to the PDF in the location bar. No dialogs, no PDF files hanging around in my home directory, and I can just copy the URL to the PDF the same way I'd copy the URL to any web page.

Thank you!

Proposed solution by original poster:

Dale Question owner 1/9/21, 9:27 AM Chosen Solution

Sigh. It appears the problem was one or both of the following preferences:

   pdfjs.enabledCache.state: false
   pdfjs.migrationVersion: 2 

I deleted both, and now clicking on a PDF just opens in the sane, normal way in Firefox that I desire.

Naturally I have no idea how those got set.

I installed Firefox Developer Edition and I am having the following issues, whenever I go to Indeed and I go to a job posting the browser opens up additional tabs without my permission or me doing so. Also the browser does the same in Canvas when I go to my course the browser automatically opens up new tabs without my permission and also me doing so. The Firefox Developer Edition browser update is Firefox Developer Edition is up to date 152.0b7 (64 bit). The following extensions are installed AdBlocker Ultimate, FoxyProxy Basic, Ghostery AdBlocker For Privacy, Malwarebytes Browser Guard, Privacy Badger, and UBlock Origin. This behavior got super annoying and I don't know how to fix it. Any help on how to fix this would be appreciated. My operating system is Windows 11.

I recently switched to Mozilla Firefox and noticed that one of my business websites won't open in the browser. I'm not sure whether the issue is with my website or Firefox itself. Has anyone experienced something similar?

Greetings. Have Windows 11 Home . I have noticed in the last month that when I click on the star that Firefox is not saving my bookmarks. I have searched online for resolution to this problem to no avail. I am up to date on my version of Firefox . Could someone please provide the steps necessary to get this feature back. I have used Firefox as my primary browser for decades and the bookmark feature has always worked fine . Thank you in advance for your assistance .

I've uninstalled Firefox and reinstalled it and cleared the cache. And it's still either not linking to certain sites at all or not, opening them correctly or completely. I don't wanna spend any more time than necessary on this since i've tried various ways to fix the issue.. If you can help me, that would be great. I guess I could use chrome, but I have used firefox for years.And as a rule, haven't had any problems up until now.

Greetings,

For the past three days (A/O 06/01/2026) I, (and others who have posted on various sites) cannot access a functioning log-in page for Google or Gmail via Firefox. If I (and others) use an alternate browser e.g., Edge, the log-in page functions and displays as it should. However, when using Firefox, the page displays as the image I've included - no functional 'log-in' icon and no Username or Password box. Using 'Private Viewing' makes no difference. As other browsers work, I will assume this is a Firefox issue. As there is no way to submit trouble tickets, I'll leave this here in hopes that someone from Firefox will pursue the issue.

Thank you in advance for any information or resolution.

Hello, Im using localized (Lithuanian) version of Firefox. Several updates back, Firefox started including russian and Polish in preferred languages by default. Personally i know how to remove those for myself. However, since im managing around 300 computers in a school. This starts to become an issue. In Lithuania we only have one official language. And when pages in a school start opening in foreign (russian) language this starts to be quite annoying. I would love to keep using Firefox but i need help.

When I opened my Firefox browser this morning, all of my bookmarks were gone, the ones in the bookmark menu and the ones on the toolbar. I am unable to get any bookmark to save.

I'm a beta update channel user, so this may not reflect what 'normal' users are seeing. I use Firefox in Linux, debian v13, so normal people that are using Windows or MacOS also might not see the changes I'm asking about? -- I have no way of knowing.

Anyway: in FF v152.0b6, the "Connection Settings" area seems to have disappeared entirely from the settings menu. I used this area of the settings frequently.

The ability to set proxy still exists in the about:config settings area. In the future, will about:config be the standard place to go for people that want to manually set (or toggle) an http/https proxy?

Thanks for reading, and thanks to all the Volunteers who make this place and Mozilla software function. I use your stuff all day, every day, and my life is better because of it.

With Mozilla Firefox for Linux Mint 150.0 after logging into Chase Bank , when trying to pay off my credit card, I get a message: "It looks like this part of our site is not working right now". However the site works perfectly with Chrome, thus the problem must be with Firefox. I have cleared the Chase cookies and still getting the same result.

When tab session manager (TSM) saves multiple windows, each with dozens of tabs, into a single imaging session file, TSM also creates and displays a list of those saved sessions. TSM now does not open any of multiple saved windows when any one of the backup listings is selected.. At one time, it did. Instead, TSM opens a single window and its tabs, on request, but opens it into the current window, only, When a new window is msnually created into which to drop the tabs, TSM simply refuses the new window, and replaces verything with a new window for its own tab collection..

I was not given a VPN setup on restarting Firefox, and have no VPN icon in my toolbar. I have tried using customise toolbar, but there is no VPN icon to add back. Version 150.0, automatically opened to "What's New in Firefox 150" on starting Firefox, just without a new VPN icon. Thanks

Please appreciate that alternative text is not always applicable.

I use the Add Image button to tick off things on a list (add image of a tick) - for my own personal use, not suitable for webviewing. Halfway through the task these Alt Text warnings just obliterate my view of the document; my attempts to not have to print it, or not have to use Adobe, are thwarted.

I'm looking at a page of grey blocks that contain a triangle which in turn contains an exclamation mark, and I can no longer see the actual document behind them.

Sorry if I've posted in the wrong place.

Please appreciate that alternative text is not always applicable.

I use the Add Image button to tick off things on a list (add image of a tick) - for my own personal use, not suitable for webviewing. Halfway through the task these Alt Text warnings just obliterate my view of the document; my attempts to not have to print it, or not have to use Adobe, are thwarted.

I'm looking at a page of grey blocks that contain a triangle which in turn contains an exclamation mark, and I can no longer see the actual document behind them.

Sorry if I've posted in the wrong place. I posted this under Thunderbird in error, whatever that is, and I reposted it under Firefox, but that;s gone. So if you find a duplicate question, I'm sorry.