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To disable automatic updates you now have to do it though about:config :/

  1. Enter about:config into the address bar,
  2. Search for 'update'
  3. Find
  4. Double-click on that link to change true to false.


Address Bar

You can narrow your searches by starting them with:

^ History
* Bookmarks
% Tabs
# Page titles
@ URLs
+ Tags, separate with spaces for multiple

They're easy to forget, but there's a little add-on you can use to remind yourself: location-bar-characters.

Reader View

Reader View is a nice clean way to read stuff online. Makes a lot of news and writing sites actually tolerable. Strips out everything but the text and images. Especially great on mobile, as it will turn pages that aren't designed for a small screen into something comfortable to read in that format.

Some add-ons for enhancing reader view (that I'm yet to test 8-)):


To add a custom RSS feed reader, so that when you click o nthe 'subscribe' button you can subscribe with your choice of reader, you:

  1. Go to about.config
  2. search for browser.contentHandlers.types
  3. Notice the numbers after them. What we need to do is look at the hiest number, and make three strings with the next number in the sequence.
  4. So right-click > New > String
  5. Enter browser.contentHandlers.types.[number].title, then add the title of your reader.
  6. Enter browser.contentHandlers.types.[number].type, then add application/vnd.mozilla.maybe.feed.
  7. Enter browser.contentHandlers.types.[number].uri, then add the URL for your readers 'add feed' function placing a %s where the feed's URL should go. This last part's the trickiest to describe, 'cause it's gunna differ for each reader. But I'll add examples below
  8. Restart Firefox.
Reader String
FreshRSS [url]/i/?c=feed&a=add&url_rss=%s

See Also


As an alternative to add-ons like Stylus you can simply add CSS rules to the file userContent.css.


  1. Open about:config and turn toolkit.legacyUserProfileCustomizations.stylesheets to True.
  2. Open your profile directory (for me it's ~/.mozilla/[profile name]) and create a directory called chrome if it doesn't exist.
  3. Inside chrome create a file called userContent.css
  4. Added rules to this, enclosed within @-moz-document domain([url]) {} that references the site you wish to target.
@-moz-document domain( {
	body {


Browser works, pages don't load

Sometimes after a crash Firefox will start-up just fine, but pages won't load. Deleting ~/.cache/mozilla seems to fix it.

I ended up making an alias in my .bashrc:

alias fix-firefox='rm -rf ~/.cache/mozilla/firefox'
tool/software/firefox.txt · Last modified: 2020/05/02 08:15 by rjt