When a later version of a browser adds support for some CSS-1 properties/values (e.g. Internet Explorer 5.0), the version number (e.g. "5.0") is entered into the table for those properties. (Internet Explorer 5.0 does not add much support for CSS-1. The only noticable change is support for the 'block' and 'inline' values of the display property.)
Navigator 4's CSS support is pretty consistent across platforms (Windows, Mac, Linux, Unix). The same applies to IE4, as far as I can tell.
Some bugs and quirks (mainly mentioned in the footnotes) are linked to related material on this site.
Green = Supported
Yellow = Partly supported
Red = Not supported
Note: Bugs aren't considered when evaluating whether or not the browser supports a property - at the end of the document you'll find some footnotes describing the most common bugs in the browsers' CSS implementations.
Property, common values | Explorer | NetScape | Opera |
font-family | 4.0 | 4.0 | 3.5 |
font-family: serif | 4.0 | 4.0 | 3.5 |
font-family: sans-serif | 4.0 | 4.0 | 3.5 |
font-family: cursive | 4.0 | - | 3.5 |
font-family: fantasy | 4.0 | - | 3.5 |
font-family: monotype | 4.0 | 4.0 | 3.5 |
font-size | 4.0 | 4.0 | 3.5 |
font-size w/ points, pixels, picas etc. | 4.0 | 4.0 | 3.5 |
font-size w/ em, percent | 4.0 | 4.0 | 3.5 |
font-style | 4.0 | 4.0 | 3.5 |
normal | 4.0 | 4.0 | 3.5 |
italic | 4.0 | 4.0 | 3.5 |
oblique | 4.0 | - | 3.5 |
font-weight | 4.0 | 4.0 | 3.5 |
bold - normal | 4.0 | 4.0 | 3.5 |
lighter / bolder 1 | 4.0 | - | 3.5 |
100, 300, 500, 700, 900 | 4.0 | 4.0 | 3.5 |
font-variant | 4.0 | 4.0 | 3.5 |
small-caps2 | - | - | 3.5 |
font (shorthand) | 4.0 | 4.0 | 3.5 |
Property, common values | Explorer | NetScape | Opera |
text-decoration | 4.0 | 4.0 | 3.5 |
none | 4.0 | 4.0 | 3.5 |
underline | 4.0 | 4.0 | 3.5 |
blink | - | 4.0 | - |
overline | 4.0 | - | 3.5 |
line-through | 4.0 | 4.0 | 3.5 |
text-transform (3) | 4.0 | 4.0 | 3.5 |
nOnE | 4.0 | 4.0 | 3.5 |
cApItAlIzE | 4.0 | 4.0 | 3.5 |
uPpErCaSe | 4.0 | 4.0 | 3.5 |
lOwErCaSe | 4.0 | 4.0 | 3.5 |
text-align | 4.0 | 4.0 | 3.5 |
left
| 4.0 | 4.0 | 3.5 |
right
| 4.0 | 4.0 | 3.5 |
center
| 4.0 | 4.0 | 3.5 |
justify
| 4.0 | 4.0 | 3.5 |
text-indent | 4.0 | 4.0 | 3.5 |
length (5mm)
| 4.0 | 4.0 | 3.5 |
percent (5%) 4
| 4.0 | 4.0 | 3.5 |
vertical-align | 4.0 | 4.0 | 3.5 |
[abc] baseline | 4.0 | - | 3.5 |
[abc] middle | - | - | 3.5 |
[abc] sub | 4.0 | - | 3.5 |
[abc] super | 4.0 | - | 3.5 |
[abc] text-top | - | - | 3.5 |
[abc] text-bottom | - | - | 3.5 |
[abc] top | - | - | 3.5 |
[abc] bottom | - | - | 3.5 |
word-spacing | 4.0 | 4.0 | 3.5 |
(5mm) word spacing | - | - | 3.5 |
letter-spacing | 4.0 | 4.0 | 3.5 |
(4px) letter spacing | 4.0 | - | 3.5 |
line-height | 4.0 | 4.0 | 3.5 |
(2em) | 4.0 | 4.0 | 3.5 |
(200%) | 4.0 | 4.0 | 3.5 |
(2) | 4.0 | 4.0 | 3.5 |
normal | 4.0 | 4.0 | 3.5 |
Property, common values | Explorer | NetScape | Opera |
color, background-color | 4.0 | 4.0 | 3.5 |
Colour names | 4.0 | 4.0 | 3.5 |
rgb(r,g,b) | 4.0 | 4.0 | 3.5 |
#rrggbb | 4.0 | 4.0 | 3.5 |
#rgb | 4.0 | 4.0 | 3.5 |
background-image | 4.0 | 4.0 | 3.5 |
url() | 4.0 | 4.0 | 3.5 |
none | 4.0 | 4.0 | 3.5 |
background-repeat | 4.0 | 4.0 | 3.5 |
repeat | 4.0 | 4.0 | 3.5 |
repeat-x | 4.0 | 4.0 | 3.5 |
repeat-y | 4.0 | 4.0 | 3.5 |
no-repeat | 4.0 | 4.0 | 3.5 |
background-attachment | 4.0 | 4.0 | 3.5 |
scroll / fixed | 4.0 | - | - |
background-position | 4.0 | 4.0 | 3.5 |
percent / direction | 4.0 | - | 3.5 |
background (shorthand) | 4.0 | 4.0 | 3.5 |
Property, common values | Explorer | NetScape | Opera |
margin | 4.0 | 4.05 | 3.5 |
margin-top | 4.0 | 4.0 | 3.5 |
margin-right | 4.0 | 4.0 | 3.5 |
margin-bottom | 4.0 | 4.05 | 3.5 |
margin-left | 4.0 | 4.0 | 3.5 |
margin (shorthand) | 4.0 | 4.0 | 3.5 |
padding | 4.0 | 4.06 | 3.5 |
padding-top | 4.0 | 4.0 | 3.5 |
padding-right | 4.0 | 4.0 | 3.5 |
padding-bottom | 4.0 | 4.06 | 3.5 |
padding-left | 4.0 | 4.0 | 3.5 |
padding (shorthand) | 4.0 | 4.0 | 3.5 |
border-width | 4.0 | 4.0 | 3.5 |
border-width | 4.0 | 4.0 | 3.5 |
border-left-width | 4.0 | 4.0 | 3.5 |
border-bottom-width | 4.0 | 4.0 | 3.5 |
border-right-width | 4.0 | 4.0 | 3.5 |
border-top-width | 4.0 | 4.0 | 3.5 |
border-style | 4.0 | 4.07 | 3.5 |
solid | 4.0 | 4.0 | 3.5 |
dotted | - | - | 3.5 |
dashed | - | - | 3.5 |
double | 4.0 | 4.0 | 3.5 |
groove | 4.0 | 4.0 | 3.5 |
ridge | 4.0 | 4.0 | 3.5 |
inset | 4.0 | 4.0 | 3.5 |
outset | 4.0 | 4.0 | 3.5 |
none | 4.0 | 4.0 | 3.5 |
border-...-style | 4.0 | 4.0 | 3.5 |
border-top-style | 4.0 | - | 3.5 |
border-right-style | 4.0 | - | 3.5 |
border-bottom-style | 4.0 | - | 3.5 |
border-left-style | 4.0 | - | 3.5 |
border-color | 4.0 | 4.07 | 3.5 |
border-color | 4.0 | 4.07 | 3.5 |
border-top-color | 4.0 | - | 3.5 |
border-right-color | 4.0 | - | 3.5 |
border-bottom-color | 4.0 | - | 3.5 |
border-left-color | 4.0 | - | 3.5 |
border shorthands | 4.0 | 4.0 | 3.5 |
border | 4.0 | 4.0 | 3.5 |
border-top | 4.0 | - | 3.5 |
border-right | 4.0 | - | 3.5 |
border-bottom | 4.0 | - | 3.5 |
border-left | 4.0 | - | 3.5 |
width, height, float, clear | 4.0 | 4.0 | 3.5 |
width | 4.0 | 4.0 | 3.5 |
height | 4.0 | - | 3.5 |
float | 4.0 | 4.0 | 3.5 |
clear | 4.0 | 4.08 | 3.58 |
Property, common values | Explorer | NetScape | Opera |
display | 4.0 | 4.0 | 3.5 |
block | 5.0 | 4.09 | 3.5 |
inline | 5.010 | 4.011 | 3.512 |
list-item | - | - | - |
none | 4.0 | 4.0 | 3.5 |
white-space | 4.0 | 4.0 | 3.5 |
pre | - | 4.0 | - |
nowrap | - | - | - |
normal | - | 4.0 | - |
list properties | 4.0 | 4.0 | 3.5 |
list-style-type | 4.0 | 4.0 | 3.5 |
list-style-image | 4.0 | - | 3.5 |
list-style-position | 4.0 | - | 3.5 |
list-style (shorthand) | 4.0 | 4.0 | 3.5 |
Property, common values | Explorer | NetScape | Opera |
pseudo elements | 4.0 | 4.0 | 3.5 |
:link | 4.0 | 4.0 | 3.5 |
:active | 4.0 | 4.0 | 3.5 |
:visited | 4.0 | 4.0 | 3.5 |
:first-line | - | - | 3.5 |
:first-letter | - | - | 3.5 |