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Questions tagged [firefox-quantum]

For questions specific to Firefox Quantum. Use [firefox] instead for questions involving Firefox in general.

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Automate a periodical "Minimize Memory usage" on Firefox

During many years using Firefox and forks and I've realized that sometimes Firefox gets slow and sometimes unresponsive. Workaround, going to about:memory, and clicking on "Measure" button ...
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0 answers
13 views

How can I remove the additional close/minimize icons in Waterfox tab bar?

How can I remove the additional close/minimize icons in Waterfox tab bar? I mean, the red circled icons: This happened after copying a Waterfox user profile to a new PC.
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  • 3
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1 answer
74 views

How to Set A secondary Debugging software in Windows 10 TaskManager Debug

I would like to know if there is a way to add a secondary debugging software, to the right click context menu of the TaskManager, Prefferably SublimeText Editor 3, or any other similar software, ...
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1 vote
1 answer
301 views

Programmatically close all tabs in Firefox Quantum

1. Summary I can't find, how I can close all tabs in Firefox Quantum without any manual mouse clicks. 2. Details (Details for preventing XY Problem) I am working on several projects. I need always ...
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0 votes
1 answer
76 views

Meaning of the notification Firefox seems slow to start?

Hi Firefox experts, When launching Firefox, it sometimes displays at the bottom a notification saying "Mozilla Firefox seems slow... to... start." Is this an official notification type within ...
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1 vote
1 answer
203 views

Firefox v73.0b1 about:config stopped supporting filtering in address bar

Before version 73.0b1 it was possible to filter about:config by entering in address bar: about:config?filter=browser After latest update to 73.0b1 this does not work any more. No preferences shown ...
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  • 113
0 votes
1 answer
25 views

how to use ctrl + 1 to switch to previous tab in firefox?

I'm using firefox 71 in mac os, i'd like to use ctrl+1 to switch to previous tab rather than command+shift+tab, how to achieve this? i tried an add-on called custom key but not working, i also tried ...
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4 votes
1 answer
189 views

How to stop Firefox searching Amazon and other "Top Sites"

Today I discovered a Firefox feature that allows you to search within particular sites by prepending the search term with an @: This seems like an implementation of the similar Chrome behaviour, ...
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1 answer
455 views

How to import passwords from FF profile into another profile w/o overwriting files/existing passwords

Situation Set up a new workstation. I did not continue the old OS (Windows) installation, but instead started fresh. Now, I want to import the passwords from the old profile into the new one on the ...
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  • 3
1 vote
0 answers
83 views

Is there an extension to quickly clear / flush / invalidate the Firefox DNS cache (Quantum)

There used to be several DNS flushing add-ons prior to Firefox Quantum. Are any currently available? Is this no longer something that's accessible through the addon API? Yes, I realize that I can do ...
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  • 557
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0 answers
182 views

Change the font of Reader, Firefox 57

This look like a duplicate of How to change font of Reader View firefox? but none of the answers there work since Firefox Quantum All points to userContent.css but none worked. use @-moz-document ...
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2 votes
1 answer
65 views

after upgrade, Firefox 60 does not show checkbox on website

I have upgraded Firefox to Firefox Quantum 60.7.0-esr. The new Firefox version does not show checkbox on a particular website: for comparison, here is a correctly displayed website in Chromium: The ...
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1 vote
1 answer
93 views

FIrefox is not rendering correctly webpages and messes with their styling

I have the default theme on Firefox 66.0.2 for Linux Mint. I have noticed that most pages don't show up as they should or as, for example, they show in Chromium. Is this something widespread, and ...
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2 votes
1 answer
68 views

Edit Firefox multi container configuration

I have several containers configured on my Firefox and I have been using for a while, so container have information associated. However, sometimes I was not very focused and I used the wrong one for ...
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0 votes
1 answer
350 views

Firefox has no back button after selecing Google search results

I'm using a friends computer today. When you select any link in the Google search results it opens the link, in the same tab, but the Firefox browser's back button is grey. I checked the history, and ...
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0 votes
1 answer
477 views

Enable testing of native pinch to zoom in Firefox

By reading this bugzilla issue I get the impression that I should be able to test the upcoming native pinch to zoom feature in Firefox by setting mousewheel.with_alt.action to 5 in about:config, but I ...
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  • 497
0 votes
1 answer
195 views

Not able to run 'Firefox Quantum 63.0 (64-bit)' and 'Firefox Developer Edition 64.0b4 (64-bit)' at the same time on Windows 10 Home Single Language OS [duplicate]

I've a laptop on which Windows 10 Home Single Language 64-bit Operating System is installed. I've installed the web browser 'Firefox Quantum 63.0 (64-bit)' on this laptop. Then, I installed the web ...
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  • 155
8 votes
2 answers
5k views

How to bring back "Save and Quit" feature in Firefox 63+?

I've always enabled the browser.showQuitWarning feature in Firefox so I can choose to keep the tabs or not when I close the browser However last week my Firefox updated to the version 63 and suddenly ...
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  • 23.1k
15 votes
3 answers
3k views

Is disabling updates really the only way to stop Firefox's "Restart required" on opening a new tab?

Firefox's (seemingly new in 63.0 but maybe I've been lucky until now) background/running updates are causing me problems as I suddenly get "Restart Required" when I open a new tab. FF claims it will ...
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  • 1,625
1 vote
1 answer
3k views

How to stop web site navigation hover pop-ups in browser

I've run into an annoying type of pop-up and can't figure out how to suppress it. The problem is links at certain sites related to web site navigation that activate when you hover on them. It ...
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  • 26.3k
1 vote
1 answer
78 views

Firefox: Remove all files from cache except images

When the Firefox browser closes, I have configured it to clear everything except cache so that images load quickly on the next run. However when I checked C:\Users\jacobgu\AppData\Local\Mozilla\...
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0 votes
0 answers
454 views

Firefox opens a filetype (textfiles, txt) incorrectly

My Firefox (Quantum on Windows 7) keeps opening text files (with .txt suffix) in the browser, despite having set it to always ask for text documents in Settings -> General -> Applications. The ...
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  • 7,643
1 vote
0 answers
212 views

Workaround for changing hotkeys in Firefox Quantum

Currently there is no "supported way" to change the keyboard shortcuts for FF 57+ (see this reddit.com post for further information). I was wondering if anyone found/knows a good workaround to assign ...
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  • 7,643
4 votes
1 answer
4k views

How to change color of a tab in Firefox Quantum?

I'm trying to change the colour of one or more tabs (not necessarily the one that is currently selected). It need to be at least the bit where the tab title is displayed, not sure how it's called. ...
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  • 7,643
1 vote
1 answer
8k views

Firefox Quantum - Kiosk Mode

I currently use this method to emulate chrome's kiosk-mode in Firefox Quantum on Windows 10: Install Firefox Quantum Install AddOn AutoFullscreen in Firefox's address-bar, type about:config and set ...
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16 votes
2 answers
9k 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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4 votes
1 answer
1k 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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  • 1,191
1 vote
1 answer
553 views

.tabbrowser-tab[unread], background-image: linear-gradient not working in userChrome.css

I had this working before but now it stopped working. I have some code in my userChrome.css to create a small grey triangle in the top right corner of an unread tab. /* Mark new and unread tabs */ ....
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  • 239
1 vote
0 answers
40 views

Touch issues in Firefox Quantum

In Firefox 56.0.2 and before, it is really easy to copy texts and drag pictures (and save them) simply by moving across your finger on the screen; a simple double touch on a word on the box of google ...
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  • 11
0 votes
1 answer
148 views

Ebay doesn't work with tree style tab & imagus in Firefox

There are couple of things, both happened at the same time so I think they're related, ebays favicon stopped displaying in Tree Style Tab and imagus stopped working on ebay. Icon shows normally in ...
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  • 35
1 vote
0 answers
140 views

Firefox menu bar is not visible when hovering in full screen mode

I installed Ubuntu 16.04 and then I installed Firefox 59 on it. Now the problem I'm having is , Firefox does not show the menu bar when I hover the title of the webpage. For other applications (...
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  • 11
2 votes
1 answer
1k views

Hide Tab Bar from mouse in FireFox fullscreen mode

When I go fullscreen in firefox, and move the mouse to the top of the screen to click something up there, my mouse accidentally hits the top of the screen and makes firefox show the tab bar, which ...
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  • 121
5 votes
1 answer
7k views

Auto resume downloads in Firefox

I tried to use some plugins (auto resume downloads, Download Auto-Resume), but it don't work or not compatible with my Firefox (Firefox Quantum 57.0 x64). I can resume download by clicking the button (...
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  • 61
0 votes
1 answer
696 views

Migrating from firefox quantum to chrome:

So when firefox quantum came out I was torn from my normal happy chrome-user life and stuck in-between two browsers for about 6 months or so: I'm sick of this kind of life. I want all my data and ...
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2 votes
0 answers
200 views

How many CPU cores can Firefox Quantum utilize?

I have a webapp that is very CPU intensive (multiple nested loops running over large dataset). I could run it in one Firefox tab or distribute the load across multiple tabs (if that's better). I was ...
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  • 121
1 vote
1 answer
58 views

Remove autosuggestion in FF quantum using about config

How do you stop quantum 58 in about config from showing the drop down suggestion box every time i want to look for something.
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7 votes
1 answer
6k views

Status bar for Firefox Quantum

1. Summary I use many addon buttons in Firefox. I don't find, how I can add additional bar for these buttons in Firefox Quantum. I need add new bar, not modify already existing Menu and Bookmarks ...
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5 votes
1 answer
2k views

Detach a tab in firefox (move tab to new window), Firefox 58

In FF, I can move a tab to a new window by either dragging the tab out of the browser, or right clicking the "move to New window" option from the context menu. is there a shortcut key to move the ...
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  • 153
23 votes
4 answers
3k views

How to show search result positions on scroll bar in Firefox?

Chrome shows positions of results from "Find in this page" on the scroll bar (see the orange lines on the scrollbar on the right). How can I enable the same feature in Firefox (72.0.2)?
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  • 333
4 votes
2 answers
3k views

Make Firefox save new bookmarks in the Bookmarks Menu (not Other Bookmarks)

Recently, Firefox has changed the default folder for newly created bookmarks (using Ctrl+D) from the Bookmarks Menu to "Other Bookmarks". Is there some way to change that back? Or some alternate ...
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  • 1,449
0 votes
1 answer
135 views

Firefox V57 plays two soundtracks on YouTube videos

Firefox recently updated to V57.0.4 on a Windows 7 machine. YouTube videos now play a double soundtrack. One soundtrack starts automatically as soon as the video loads, prior to clicking the play ...
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  • 26.3k
0 votes
1 answer
634 views

How do I re-enable the regular title bar in Firefox Quantum?

Is there a way to re-enable the regular title bar for the program window in Firefox (V57, Quantum) for Windows (currently Windows 7)? By default the windowbuttons (close window, minimize window, ...
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  • 7,643
13 votes
5 answers
6k views

Is it possible to quickly restart Firefox Quantum (V57 or up)?

I want to quickly restart Firefox, not losing any tabs or windows that are still open before the restart. There used to be several add-ons for Firefox in order to add a restart button. So far (as of ...
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  • 7,643
5 votes
2 answers
625 views

Why doesn't Firefox Quantum show equations in Wikipedia in MathML any more?

In my Wikipedia account I've set the math appearance preference to MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools), and it worked fine for a long time... ... ...
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  • 23.1k
1 vote
2 answers
156 views

Firefox Quantum unable to follow link

I'm unable to follow a specific link in Google search results. The browser simply gets stuck and does nothing. I have Firefox Quantum 57.0.2 (64 bits) running in safe mode (extensions disabled) on ...
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3 votes
0 answers
424 views

Firefox Developer Tools failed to inspect variables on hover over

I have FireFox Quantum 57.0.2 (64 bits) and Windows 8.1. It was working fine till now, but suddenly I can't get pop up value on hover over variables. This and other issues come up in all pages ...
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9 votes
1 answer
6k views

Customize the maximum width of the Firefox sidebar?

I have Firefox Quantum web-browser version 57.0.2 (64-bit) in Windows 7. The Sidebar, unfortunately, has a maximum width of about 540 pixels. I tried to increase this constraint by going to about:...
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  • 1,180
5 votes
3 answers
2k views

Custom DuckDuckGo search engine in Firefox >= 57 Quantum

I use DuckDuckGo search engine. I have customized it and saved my settings to the cloud. Now I would like to use the customized version as my default Firefox 57 search engine. Is it possible to edit ...
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  • 283
0 votes
0 answers
136 views

Firefox Quantum Shortcut on taskbar

With older version of Firefox Quantum, you could right click the icon on the window taskbar and open either regular window or private broswer depending on your needs. For some reason or another, that ...
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  • 137
5 votes
1 answer
2k views

Disable single shortcut in firefox quantum

Is it possible to disable a single keyboard shortcut in firefox quantum? I would very much like to disable ctrl-n (or at least be able to capture and event.preventDefault() it) in firefox 57. Previous ...
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  • 258