Minor doc fixes.

(browse-url-temp-dir): New variable.
(browse-url-of-buffer): Use browse-url-temp-dir.  Don't construct
a temporary file name which includes an arbitrary buffer name to
avoid losing on non-unixy systems.

lisp/browse-url.el

@@ -94,7 +94,8 @@
 ;; <URL:http://lynx.browser.org/>.
 
 ;; Free graphical browsers that could be used by `browse-url-generic'
-;; include Chimera <URL:ftp://ftp.cs.unlv.edu/pub/chimera>, Arena
+;; include Chimera <URL:ftp://ftp.cs.unlv.edu/pub/chimera> and
+;; <URL:http://www.unlv.edu/chimera/>, Arena
 ;; <URL:ftp://ftp.yggdrasil.com/pub/dist/web/arena>, Amaya
 ;; <URL:ftp://ftp.w3.org/pub/amaya>, mMosaic
 ;; <URL:ftp://sig.enst.fr/pub/multicast/mMosaic/> (the latter with
@@ -261,7 +262,7 @@ Netscape version 1.1N or later or XMosaic version 2.5 or later."
 
 (defcustom browse-url-netscape-display nil
   "*The X display on which Netscape is running if different from
-  Emacs's display."
+Emacs's display."
   :type 'string
   :group 'browse-url)
 
@@ -373,6 +374,14 @@ These might set the port, for instance."
   :type '(repeat (string :tag "Argument"))
   :group 'browse-url)
 
+(defcustom browse-url-temp-dir
+  (or (getenv "TMPDIR") "/tmp")
+  "*The name of a directory in which to store temporary files
+generated by functions like `browse-url-of-region'.  You might want to
+set this to somewhere with restricted read permissions for privacy's sake."
+  :type 'string
+  :group 'browse-url)
+
 (defvar browse-url-temp-file-list '())
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -389,7 +398,7 @@ These might set the port, for instance."
 
 (defun browse-url-interactive-arg (prompt)
   "Read a URL from the minibuffer, prompting with PROMPT.
-Default to the URL at or before point.  If invoke with a mouse button,
+Default to the URL at or before point.  If invoked with a mouse button,
 set point to the position clicked first.  Return a list for use in
 `interactive' containing the URL and `browse-url-new-window-p' or its
 negation if a prefix argument was given."
@@ -468,12 +477,9 @@ narrowed."
 	  (progn
 	    (or browse-url-temp-file-name
 		(setq browse-url-temp-file-name
-		      (make-temp-name
-		       (expand-file-name (buffer-name)
-					 (or (getenv "TMPDIR") "/tmp")))
-		      browse-url-temp-file-list
-		      (cons browse-url-temp-file-name
-			    browse-url-temp-file-list)))
+		      (convert-standard-filename
+		       (make-temp-name
+			(expand-file-name "burl" browse-url-temp-dir)))))
 	    (setq file-name browse-url-temp-file-name)
 	    (write-region (point-min) (point-max) file-name nil 'no-message)))
       (browse-url-of-file file-name))))