How to permanently zoom in Firefox without using addons?

How can you permanently zoom in Firefox without using an add-on?

Does Firefox have a zoom option similar to Internet Explorer, Chrome & Opera's zoom to x% option?

Niks

Posted 2012-01-04T13:25:53.753

Reputation: 427

Answers

Notice: These settings may not work with version 29 or newer.

Open Firefox and type about:config into the address bar and search for "zoom".

In the search results, change two settings as below.

browser.zoom.siteSpecific false
zoom.minPercent 150

The value of zoom.minPercent must be an integer.

Sencer H.

Posted 2012-01-04T13:25:53.753

Reputation: 961

Version 47 and still this method doesn't work – D.Snap – 2016-08-03T08:50:40.237

Or one can simple set zoom.minPercent 150 and zoom.minPercent 150. – mk1024 – 2019-07-05T21:02:36.100

@mk1024 I think you said same thing twice. – Sencer H. – 2019-07-08T11:42:42.943

Emperically determined: Firefox must be restarted before it takes effect, at least for zoom.minPercent. Tested with Firefox 8.0.1 (Portable edition) – Peter Mortensen – 2012-02-15T09:40:30.153

1This does not work with Firefox 29 – Steven Penny – 2014-05-04T07:58:19.430

I guess this is a bug in 29. I did the changes and restart the firefox. All sites started in %100. When I touch ctrl+scroll, page became %150 zoomed. I think, somehow, they broke zoom.minPercent behaviour option on startup. – Sencer H. – 2014-05-05T09:03:16.940

From https://superuser.com/a/1268867 :

The default zoom in Firefox can be reset to any value for all webpages without installing an extension.

In the Firefox address bar type: about:config

Search for this preference: layout.css.devPixelsPerPx

Replace the default value of -1.0 with the new percentage zoom. For example, if you want to change the default zoom from the default value of 100% to 125%, then change the value of layout.css.devPixelsPerPx to 1.25

This affects the GUI and web content, not just the web content or just the text.

david.libremone

Posted 2012-01-04T13:25:53.753

Reputation: 1 128

Not sure if this is what you ask for, but you can increase the minimum font size on you browser. That way you'll have larger letters.

like this: increase-min-fint-size

karla

Posted 2012-01-04T13:25:53.753

Reputation: 249

1not just the font size .... the whole webpage – Niks – 2012-01-04T13:33:04.570

scroll up the page - you might find your answer. – karla – 2012-01-04T13:33:56.393

1that isn't permanent zoom – Niks – 2012-01-04T13:35:39.230

I made a little search - there seems not to be such an option. But wikipedia's acticle about firefox says, that it should remember your zooming settings for each site. – karla – 2012-01-04T13:40:14.153

Control+MouseWheel zooms, and the zoom-level is remembered on a per-site basis, unless you clear your history.

Tog

Posted 2012-01-04T13:25:53.753

Reputation: 4 747

1(ctrl and + ) (ctrl and -) browser/tab wide zoom = same like ctrl mouse wheel up/down – Piotr Kula – 2012-01-04T13:36:38.403