1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
|
<?xml version="1.0" encoding="utf-8"?>
<!-- This Source Code Form is subject to the terms of the Mozilla Public
- License, v. 2.0. If a copy of the MPL was not distributed with this
- file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"[
<!ENTITY % brandDTD SYSTEM "chrome://branding/locale/brand.dtd" >
%brandDTD;
]>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Viewing Page Info</title>
<link rel="stylesheet" href="helpFileLayout.css"
type="text/css"/>
</head>
<body>
<h1 id="viewing_page_info">Viewing Page Info</h1>
<p>The Page Info dialog box consists of several tabs that display different
kinds of information about the page you are viewing. This section provides a
brief overview of the information available in each tab.</p>
<p>To view Page Info for the page currently displayed by the browser, open the
View menu and choose Page Info. You can then click the tab that corresponds
to the kind of information you want to view.</p>
<p>Most of the information displayed by the General, Forms, Links and Media
tabs in Page Info is taken from the HTML source for the page. This
information is usually of interest only to web developers and other
specialists.</p>
<p>For detailed information about HTML, including the tags displayed by Page
Info, see the <a href="http://www.w3.org/TR/REC-html40/">HTML 4.01
Specification</a>.</p>
<div class="contentsBox">In this section:
<ul>
<li><a href="#general_tab">General Tab</a></li>
<li><a href="#forms_tab">Forms Tab</a></li>
<li><a href="#links_tab">Links Tab</a></li>
<li><a href="#media_tab">Media Tab</a></li>
<li><a href="#privacy_tab">Privacy Tab</a></li>
<li><a href="#security_tab">Security Tab</a></li>
</ul>
</div>
<h2 id="general_tab">General (Page Info Tab)</h2>
<p>When you choose Page Info from the View menu, the General tab displays basic
information about the page that you are viewing in the browser.</p>
<p>The top portion displays the name of the page (if it has one) and the
following information:</p>
<ul>
<li><strong>URL</strong>: The
<a href="glossary.xhtml#url">Uniform Resource Locator</a> for the
page—that is, the standardized address that appears in the Location
Bar near the top of the browser window.</li>
<li><strong>Render mode</strong>: Indicates whether the browser is using
<strong>quirks mode</strong> or <strong>standards compliance mode</strong>
to lay out the page. Quirks mode takes account of nonstandard behavior that
may be used by some older web pages designed for older versions of web
browsers that are not fully standards compliant. Standards compliance mode
adheres strictly to standards specifications. Your browser chooses the
render mode automatically according to information contained in the web
page itself.</li>
<li><strong>Source</strong>: Indicates whether the source code for this page
has been cached.</li>
<li><strong>Encoding</strong>: The character encoding used for this HTML
document.</li>
<li><strong>Size</strong>: The size of the file, if available.</li>
<li><strong>Modified</strong>: The date the page was last modified, if
available.</li>
<li><strong>Expires</strong>: The date on which the information displayed by
the page expires.</li>
</ul>
<p>The bottom portion displays the metatags specified by the page. Metatags
provide information about the type of content displayed by a page, such as a
general description of the page, keywords for search engines, copyright
information, and so on.</p>
<h2 id="forms_tab">Forms (Page Info Tab)</h2>
<p>When you choose Page Info from the View menu and click the Forms tab, you
see information about all the forms displayed by the page you are currently
viewing in the browser.</p>
<p>The top portion lists basic information about the way each form in the page
is specified in the HTML source:</p>
<ul>
<li><strong>Name</strong>: The form's name, if any.</li>
<li><strong>Method</strong>: The HTML method used to send information
captured by the form back to the web server. <tt>GET</tt> appends your
filled-in values to the website address to which it submits the form.
<tt>POST</tt> sends the values to the website as parameters that can be
read by a program on the website.</li>
<li><strong>Form Action</strong>: The URL of the program to be invoked when
the form is submitted.</li>
</ul>
<p>When you select a form listed in the top portion of the Forms tab, the
bottom portion displays detailed information about the way each of that
form's elements is specified in the HTML source:</p>
<ul>
<li><strong>Label</strong>: The element's label (if it is tagged as such
in the HTML).</li>
<li><strong>Field Name</strong>: The element's name.</li>
<li><strong>Type</strong>: The element's input type, such as
<tt>TEXT</tt> (for submitting text), <tt>RADIO</tt> (for a radio button),
or <tt>HIDDEN</tt> (for storing information that is submitted but not
displayed on the screen).</li>
<li><strong>Current Value</strong>: The current value of the element. For
example, the current value of a text element is the text it currently
contains.</li>
</ul>
<h2 id="links_tab">Links (Page Info Tab)</h2>
<p>When you choose Page Info from the View menu and click the Links tab, you
see a list of all the links available on that page. The following information
is displayed for each link:</p>
<ul>
<li><strong>Name</strong>: The text displayed in the browser as a link.</li>
<li><strong>Address</strong>: The <a href="glossary.xhtml#url">URL</a> for the
page to which the link points.</li>
<li><strong>Type</strong>: The type of link, such Anchor (for a link to a
specific place in an HTML document) or Form Submission.</li>
</ul>
<h2 id="media_tab">Media (Page Info Tab)</h2>
<p>When you choose Page Info from the View menu and click the Media tab, you
see a list of all the images and other media elements displayed by the
page.</p>
<p>The top portion lists basic information about each element, including its
address (<a href="glossary.xhtml#url">URL</a>) and type.</p>
<p>When you select a media element listed in the top portion of the Media tab,
the bottom portion displays available information about that element, such as
description, size, or dimensions.</p>
<p>You can also see the selected element at the bottom of the dialog box. To
see larger images, you need to click the lower-right corner of the Page Info
dialog box and drag.</p>
<p>To save a media element as a separate file:</p>
<ul>
<li><strong>Save As</strong>: Select the element you want to save, click Save
As, and navigate to the location where you want to save it.</li>
</ul>
<h2 id="privacy_tab">Privacy (Page Info Tab)</h2>
<p>When you choose Page Info from the View menu and click the Privacy tab, you
see a list of all the special elements that are part of the page.</p>
<ul>
<li><strong>Page Components</strong>: Under the page URL, there are many
categories. To see the list of items in any category, double-click on
the name:
<ul>
<li><strong>Links</strong>: Shows all of the links.</li>
<li><strong>Java Applets</strong>: Lists the Java applets (if any).</li>
<li><strong>Image Maps</strong>: Shows all of the image maps.</li>
<li><strong>Form Submissions</strong>: List the script names used to
gather used data on the page.</li>
<li><strong>Frames</strong>: Shows the frames which make up the page.</li>
<li><strong>Images</strong>: Displays all of the images used in the
page.</li>
<li><strong>External Loaded Documents</strong>: Contains the list of the
external documents loaded to display the page (such as css files or
images).</li>
<li><strong>Generic Objects</strong>: Shows a list of generic
objects.</li>
<li><strong>Scripts</strong>: Lists all of the scripts in the page.</li>
</ul>
</li>
<li><strong>Policy</strong>: This button will try to open the policy file for
the website whose page is currently shown.</li>
<li><strong>Summary</strong>: Select this if you want to view the Privacy
Policy Viewer, showing concise data about the privacy policy of the website
you are browsing.</li>
<li><strong>Options</strong>: This will try to open the page on the remote
website that allows the user to modify his/her own personal data stored on
the remote website.</li>
</ul>
<h2 id="security_tab">Security (Page Info Tab)</h2>
<p>When you choose Page Info from the View menu and click the Security tab, you
see information about
<a href="glossary.xhtml#authentication">authentication</a> and
<a href="glossary.xhtml#encryption">encryption</a> for the web page you are
viewing. The top portion indicates whether the website's identity has
been verified, and the bottom portion describes whether the page was
encrypted when it was received by the browser.</p>
<p>You can also open the Security tab directly by clicking the lock icon in the
lower-right corner of any browser window.</p>
<p>The top portion of the Security tab can display any of these messages:</p>
<ul>
<li><strong>Website Identity Not Verified</strong>: The website you are
viewing did not present a certificate to authenticate itself. Therefore,
Certificate Manager cannot verify its identity. It is possible, though
unlikely, that the website is not what it claims to be.</li>
<li><strong>Website Identity Verified</strong>: The certificate that
Certificate Manager has used to verify this website's identity was
issued by a certificate authority (CA) marked as one that you trust. You
can be reasonably confident that the website is what it claims to be.</li>
</ul>
<p>The bottom portion of the Security tab can display any of these
messages:</p>
<ul>
<li><strong>Connection Not Encrypted</strong>: It is possible that other
people can view information sent from your computer to the website or
information sent by the website to your computer, but it is unlikely that
someone is actually doing so.</li>
<li><strong>Connection Encrypted</strong>: In general, the strength of an
encrypted connection depends on the length of the keys used for encryption,
measured in bits. The longer the key, the stronger the
encryption—that is, the harder it is to for an unauthorized person to
unscramble the encrypted information.
<p>The Page Info window describes encryption strength in one of three
ways:</p>
<ul>
<li><strong>High-grade encryption</strong>: Strongest encryption
available, using 128-bit keys at a minimum.</li>
<li><strong>Medium-grade encryption</strong>: Somewhat stronger than
low-grade encryption, using 56- or 64-bit keys.</li>
<li><strong>Low-grade encryption</strong>: Weakest encryption available,
using 40-bit keys.</li>
</ul>
<p>Most websites support high-grade encryption. If you are viewing an older
website that supports a weaker form of encryption, it is possible that
other people can view information sent from your computer to the website
or information sent by the website to your computer, but it is unlikely
that someone is actually doing so.</p>
</li>
</ul>
<p>Lack of any encryption or lack of strong encryption should be of concern
only if you are sending or viewing confidential information, such as your
credit card number.</p>
<p>You can quickly check the encryption status of a web page by noting the
state of the lock icon at the bottom-right corner of the browser window. For
more details, see
<a href="using_certs_help.xhtml#checking_security_for_a_web_page">Checking
Security for a Web Page</a>.</p>
</body>
</html>
|
