Best Minimum Font Size Text Zoomthere Mozilla Addons Alternatives

Minimum Font Size Per Domain

Assign Ctrl+Shift+0 (zero) (or Cmd+Shift+0 for Mac OS X) to set (or reset to default) the minimum font size for all font groups.
The value for the font size is specified in the add-on settings.

Makes the whole internets grey with plain fonts.

Increases the Thai font size on web pages so it's more easily readable.

Increases the Thai font size on web pages so it's more easily readable.

Copies text without formatting...

Simply makes address bar and its suggestions have bigger font. No annoying toggle button.
Based on Make Address Bar Font Size Bigger by Jonathan Marzullo.

Multi-line tab labels with custom font size. Infinite scroll for the tab bar. Custom tab widths for selected and unselected tabs. All features are optional and configurable in the toolbar panel.

This add-on will force text color to black, when appropriate.

Increases the font size of the URL/Address Bar.

I just used the package-add-on tool on Mozilla Dev Hub, and changed the CSS to increase the URL/Address Bar font-size (The source is viewable via a link below in the view information tab).

Allows to copy selected text as plain text by adding a 'Copy as Text' menu item to context menu.

Makes the URL bar and Search bar more readable, and the navigation-toolbar compact.

Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey