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An open-source web browser developed by Mozilla. If relevant to the question, also include the tag of your operating system.

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Are there keyboard shortcuts for accessing results from Firefox's Awesome Bar?

I usually hit CTRL-L to focus on the awesome bar and then type * foo to get to my bookmark called "foo". It invariably comes up as the second result or maybe third. Is there a quick shortcut to pick ...
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0answers
8 views

Firefox login via address bar

Is there an option to send the login as well as password to a form through the address bar similar to the keyword-based search? I prefer to login manually but would appreciate if I could load the ...
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1answer
22 views

Change Browser version and Resolution in Firefox or Chrome

Is there any way/addon to "automatically" change the browser size and user agent every time a new instance of Firefox/Chrome is opened? For example I want to test webpage on my machine and I want to ...
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1answer
9 views

Delay playing video opened in new Firefox tab until tab is selected (pre-Quantum)

I have stuck with Firefox 52 ESR because I rely on some add-ons for which there aren't yet replacements in Quantum. I often spawn multiple tabs containing videos. These all start playing immediately ...
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26 views

How do I tell Firefox to stop asking me whether to open or save files [duplicate]

When I click a link to a file that Firefox cannot natively display, it gives me this dialog box: I always want to save files, not open them. I want that to happen every time and for every file type, ...
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1answer
31 views

Filter for uBlock

I'm using uBlock ad blocker on Firefox. Originally I have free filters such as: search.yahoo.com###yui_3_10_0_1_1531993940314_95 search.yahoo.com###yui_3_10_0_1_1532027806134_88 search.yahoo.com###...
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2answers
46 views

How to backup history in Firefox?

Firefox currently has a history page limit. In about:config: places.history.expiration.transient_current_max_pages: 10322 I want to retain it completely. There are lot of useful information in that ...
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1answer
51 views

How to merge 2 windows in Firefox

How can i merge 2 windows in Firefox Quantum, i.e. move all tabs of these 2 windows to 1 window? I have many Firefox windows open and want to merge 2 of them. So far Web searches merely turn up ...
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1answer
13 views

Firefox shows multiple PIN prompts for smartcard using OpenSC

I installed OpenSC 0.18 and added the PKCS11 DLL as a security device provider in Firefox 61. I can "unlock" my smart card from the Security Devices dialog, and get prompted for the PIN as expected. ...
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1answer
13 views

Changing Proxy Port in Firefox

I often find myself going to Firefox > Options > General > Network Proxy > Settings > Manual Proxy Configuration and setting the port. Option 1: Is there a way to increase the port number by one ...
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1answer
12 views

Minimum tab width in Firefox Quantum

Firefox Quantum changed the minimum width of Tabs, previous versions of Firefox had it set to a greater value. (*minimum tab width - when you have a lot of open tabs they shrink to some predefined ...
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0answers
8 views

Call to same-domain API from React website throws 401 on Chrome and Edge, but works on IE and Firefox

Background I have a React website that posts a status update to an API on the backend, both are on the same server and domain. This POST is done using a wrapper function on top of fetch: export ...
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0answers
14 views

How to determine which preference file lock a Firefox config option

On a Windows 7 computer, My Firefox network.proxy.type is locked so I cannot modify it When looking at C:\Program Files (x86)\Mozilla Firefox\default/prefs/localsettings.js there are only 2 lines: ...
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2answers
73 views

What happened to the old hamburger menu?

I remember pre-quantum Firefox having a hamburger menu with icons which you could customize: However my current version of Firefox (60.0) seems to have lost it in favor of a more classic menu woth ...
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1answer
62 views

I Need to Keep a Window Active

I need to keep a browser window active while I use another window. "Keep-on-Top" is not what I'm looking before because when I switch pages, it still goes inactive. I'm trying to keep a page ...

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