I'm trying to use basic HTML to load a page in a Firefox (v22, I know it's outdated but it's what I'm forced to use) sidebar instead of a new tab or window. I have the HTML all set to automatically redirect to my desired URL after a short time, but once it loads it's loading in the main window and not the sidebar like I want. I tried the basic 'target=_' options and none of those worked. Is there a simple way to accomplish my goal? I feel like an idiot but I'd rather feel stupid and ask for help and get an answer than continue beating my head against a wall. Thanks in advance.
You can use frames for this
The <frameset> element holds one or more <frame> elements. Each element can hold a separate document.
Like,
<frameset cols="20%,*">
<frame name="left" src="col1.html">
<frame name="right" src="col2.html">
</frameset>
See examples here