Skip to main content
Share Your Experience: Take the 2024 Developer Survey

Questions tagged [firefox-57]

Firefox 57 is a major update of Mozilla Firefox, released in 2017, known for a new parsing engine and extensions system. It is also styled "Firefox Quantum" in marketing materials.

Filter by
Sorted by
Tagged with
1 vote
2 answers

How to prevent websites from storing offline data in Firefox 57

This appears to be either a long-running bug or an "unintended feature". Certain websites store data for offline use. I don't know why, but I do know that this data is separate from cookies and cache....
user851647's user avatar
2 votes
1 answer

How to change the default local storage settings in Firefox?

In Firefox 57, when I open a website, and check its permissions I can see a long list: I want to change these two default settings: Maintain offline storage Store Data in Persistant Storage (not ...
user32421's user avatar
  • 121
11 votes
1 answer

Firefox Quantum - I want to access restricted port but `` does not work?

Firefox Quantum - I want to access restricted port but does not seem to work. How can I connect to http://localhost:4045 ?
ruseel's user avatar
  • 211
5 votes
1 answer

One website inaccessible on only one computer

My wife's Win 7 computer is suddenly unable to connect with one web site (no problem with any other site). Web site: shows no problem with the site. I ...
fixer1234's user avatar
  • 27.5k
6 votes
1 answer

Is Firefox 57 multithreaded?

According to Multiprocess Firefox on MDN, Firefox 57 finally runs things in different processes. So is Firefox 57 multithreaded? In particular, how many cores does it use at most? Say I open 20 tabs ...
Nemo's user avatar
  • 1,134
6 votes
1 answer

Firefox 57 cannot display Arial on Linux

After upgrading Firefox to version 57 on my Ubuntu (16.04 LTS) Linux system, the browser will no longer display the Arial font. It simply discards all characters except international ones (such as ø). ...
oz1cz's user avatar
  • 177
7 votes
1 answer

Need a do-it-yourself replacement for tab groups in Firefox 57

The recent update to Firefox 57 marked my favourite Tab Groups extension obsolete; the Firefox Multi-Account Containers extension it offers is nowhere near adequate - this apparent beta can't even ...
sigil's user avatar
  • 185
12 votes
8 answers

All tabs groups lost after updating to Firefox 57.0 Quantum

All tabs groups lost after updating to Firefox 57.0 Quantum I need to get back not only the open tabs (within the "active" group of tabs) but the rest of them (the ones that were open in "inactive" ...
jakijem's user avatar
  • 123
4 votes
4 answers

Firefox Quantum (>=57) How to toggle all toolbars? (with a keyboard shortcut, like F11 but in a window, not fullscreen)

F11/Fullscreen is sometimes impractical*. I just want to toggle the toolbars. In older Firefox versions this was possible with the addon "Dorando keyconfig": 1. specify a script: var s = document....
MacMartin's user avatar
  • 1,013
13 votes
5 answers

How can I downgrade Firefox?

I let Firefox auto update and I don't like some new feature, the new GUI, or it broke something. How do I roll back or downgrade? NOTE: Potential duplicate questions (1, 2) did not come up in a ...
YetAnotherRandomUser's user avatar
92 votes
6 answers

How to hide tab bar (tabstrip) in Firefox 57+ Quantum

How to hide/disable/remove the tab bar in Firefox 57+ ("Quantum")? The goal is to just hide the tab bar totally. Useful if paired with extensions like "Tree Style Tab". Note: there ...
VasyaNovikov's user avatar
  • 3,526
3 votes
4 answers

How to get back the vanilla bookmarks folder color in Firefox 57?

I am not a fan of the bookmarks folder colors in Firefox 57 default theme: In prior version the folders were colored in vanilla color: Is there anyway to get that color back in Firefox 57?
AngryHacker's user avatar
  • 18.7k
3 votes
1 answer

How can I increase tooltip size in Firefox 57?

I'm currently on Firefox 56 and have seen the warning that many add-ons are going to break in 57, which is coming soon. I'm using one of the deprecated add-ons to increase the text size in tooltips, ...
Monica Cellio's user avatar
9 votes
3 answers

Disable elements of the firefox 57 UI for TreeStyleTab

I recently upgraded from firefox 55 to firefox 58 nightly and many extensions have to be updated. Treestyletabs is the only extension that I really use and it has been reimplemented as a sidebar panel....
abrahimladha's user avatar
8 votes
4 answers

Firefox 57 / block Javascript per site

As you all might know, Mozilla is migrating its addon system to WebExtension and so many addons break from version 57+, see more here: In ...
log69's user avatar
  • 163
33 votes
7 answers

Change Firefox new tab background

I always use dark personas theme or the default compact dark theme that comes included with Firefox and I don't like the default background color being white when I open a new tab. There was an add on ...
danicotra's user avatar
  • 1,986