Zoom Page WE for Chrome and Firefox gives you more control over zooming in/out of web pages.
You can either use Zoom Page WE per-site or per-tab with full-page zoom, text-only zoom, and minimum font size adjustments available. Fit-to-width zooming can be applied to pages automatically. Fit-to-window scaling can be applied to small images.
To change the zoom level for a page, click on the toolbar button to show the popup panel, then click on one of the six buttons on the right side of the popup panel:
Type - toggles the type between Full and Text.
Level (%) - shows a drop-down menu from which a specific level can be selected.
In (+) - increases the level to the next defined level or by a fixed-step.
Out (-) - reduces the level to the next defined level or by a fixed-step.
Autofit - adjusts the level so the page contents fit the browser window's width.
Reset - applies the defined default full/text level depending on the current type.
To change the minimum font size for a page, click on the toolbar button to show the popup panel, then click on one of the two buttons on the left side of the popup panel:
Minimum Size (px) - shows a drop-down from which a specific minimum font size can be selected.
Reset - applies the defined default minimum font size.
Zoom Page WE is pretty straightforward and doesn't need much explanation for use other than what is provided above. If you want a little more control over the zoom process, including per-site or tab, then this will fit the bill for you.