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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MacOS 10.11.6 Firefox 57.0.4

Just found Firefox- How to change font size of items in folder on bookmarks toolbar? Realize it's for an older Firefox version, which might not work in 57+, but want to give it a try there. Needing ...
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6 views

Firefox: Is it possible to create a bookmark for searched history using “chrome://” url

I can create a bookmark in Firefox using the following URL:chrome://browser/content/history/history-panel.xulIs it possible to get a URL with searched keywords, such as ?q=windows ?Alternately, ...
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8 views

NoScript hotkeys in Firefox Quantum

I'm new to NoScript and Firefox Quantum (57) is the first browser I'm using it in. I've noticed on this page https://noscript.net/features that there should be some NoScript hotkeys and about:config ...
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14 views

Firefox beta falsely offers updates

I am running Firefox beta 58.0b16 (the current latest) on Linux x86_64 from the official Mozilla tarball. I have it installed in a nonstandard location, /opt/mozilla/firefox-beta (owned by root), but ...
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6 views

Firefox 57 Not Asking To Save Passwords (certain sites only)

According to this, https://stackoverflow.com/questions/3868299/is-autocomplete-off-compatible-with-all-modern-browsers/21348793#21348793, browsers ignore autocomplete="off" for login/password fields. ...
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1answer
44 views

Why is there no error when I enter many slashes in a file URL in a browser?

On my Windows 10 machine I can enter a file URL of a local directory (e.g. file:///D:/temp), or a local file (e.g. file:///D:/temp/homepage.html) and everything works fine. However, wherever there ...
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1answer
22 views

How to copy a URL with its title in markdown format?

In Firefox 56, how can I quickly copy a URL in the markdown format?[title](url)In theory, VimFx should work, but it doesn't, so I either want to find what's wrong or another method to do this.
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5 views

Firefox crash recovery started writing much data to disk, after cleaning the Firefox local cache

I recently cleared the Firefox local cache on Windows (Cache resides in AppData/Local), using the Firefox "clear cache" option in Settings.My cache was exceeding 300MB, so I thought I should clear ...
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22 views

Unable to uninstall Firefox Quantum from my Windows

I am very sorry to say that but Firefox is getting really annoying, I've installed the last version of Firefox quantum,now that I want to remove it because I made my chrome browser the default browser ...
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6 views

Loading Session Manager backup in Firefox 56 without interface?

The Session Manager addon for Firefox seems to not work so well with v56 (and not at all with 57). It used to prompt me upon opening Firefox to select the session, but despite double-checking my addon ...
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10 views

When using Html <keygen>, where does web browsers stores the private key on disk?

Simple question but I couldn’t found the answer anywhere. The point is there aren’t reachable form the certificate store. I need to find them before generating a certificate from them.For example, ...
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1answer
4 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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9 views

How to persist Firefox Bookmark pane setting?

The latest Firefox has a bookmark button near the address bar. When the bookmark pane is showing and then Firefox shutdown, the bookmark state is lost. When Firefox restarts the bookmark pane is not ...
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13 views

set up a web page on github pages, but Chrome/Edge can not get the updated page

I put a index.html on github page.Firefox can get the newest web page after the update.But if I use Chrome/Edge to access the web page, it always return the non-updated page.I try to disable the ...
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16 views

How do I automatically open for equally sized firefox windows with a certain URL?

Is easy to get two equally sized windows of a software in Windows 10 however I haven't found a good way to create 4 windows when I want to see 4 websites I browse with Firefox at the same time.Is ...
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38 views

How can I tell Firefox that I want to view some plaintext MIME types directly in the browser

I got a link from a friend which pointed to a standard .patch file, and the web server served-up the file with a Content-Type of text/x-diff. Firefox prompted me to download the file, but I'd prefer ...
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7 views

How to disable spell checking in Firefox for a specific website/domain?

I want spell checking enabled on Firefox except in a few websites.How can I permanently disable spell checking in a specific website or a domain, e.g. foo.xxx?I know I can right-click and remove ...
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2answers
25 views

How can I have Firefox to fill ALL form fields?

I am using the latest Firefox.I am currently web developing and needs a way to automate form filling. There are multiple fields in my form, but Firefox's only fill per-fields (I need to click per-...