avoiding a reposting refresh on iframe activation

[al_9x]

Fx 4.0.1, NS 2.1.1.2rc3, new profile, forbid iframe on trusted, allow the test page

test page:

Code: Select all

<form method="post">
<input type="submit">
</form>
<iframe width="0" height="0" frameborder="0" src="http://www.google.com/">
</iframe>

1. load the test page from a server
2. click submit
3. activate the iframe
4. NS decides to refresh the page which results in:

   Code: Select all

   To display this page, Firefox must send information that will repeat any action (such as a search or order confirmation) that was performed earlier.
   

5. Should a refresh be happening at all? I vaguely remember a discussion about invisible utility plugins, but do those reasons apply to iframes?
6. Even if a refresh is advisable, perhaps it should avoided in cases of reposts?

[Giorgio Maone]

[*] Should a refresh be happening at all?

No it shouldn't.
If it does, it's a bug (only the frame content should be refreshed).

Investigating...

[al_9x]

[*] Should a refresh be happening at all?

No it shouldn't.
If it does, it's a bug

It does, you don't need to post first, that just makes it visible to the user.
There is no refresh without frameborder="0", which makes the iframe size > 0, you are probably just treating it the same as a plugin?

So there are two issues here:

1) getting rid of the unnecessary refresh on 0 size iframe activation
2) for cases where refresh is deemed advisable ((nearly)invisible plugins?), I think it's best to avoid it if it leads to reposts and warning. What do you think?

[Giorgio Maone]

1) getting rid of the unnecessary refresh on 0 size iframe activation

Yes. It's significantly less likely to need being scripted by the parent page.

2) for cases where refresh is deemed advisable ((nearly)invisible plugins?), I think it's best to avoid it if it leads to reposts and warning. What do you think?

Probably.

[al_9x]

confirmed