Updated Firefox version in Callout on Flex Grid Page

Updated version of Firefox to be 43+ since the current version is v45 which still has this issue.

diff --git a/docs/pages/flex-grid.md b/docs/pages/flex-grid.md
index fc8523e7ab766c2ac3f833a23181bbaf95ba4980..9eeb2b3e47aa3bc8012b1db2bd8b44fb5f2b8f09 100644 (file)
--- a/docs/pages/flex-grid.md
+++ b/docs/pages/flex-grid.md
@@ -13,7 +13,7 @@ The flex grid works very similarly to the standard float grid, but includes a nu
 The flex grid is only supported in Chrome, Firefox, Safari 6+, IE10+, iOS 7+, and Android 4.4+. Flexbox is supported in Android 2, but not reliably enough for use with this grid. ([View flexbox browser support.](http://caniuse.com/#feat=flexbox)) We recommend only using the flex grid on projects that can live with purely cutting-edge browser support.
 
 <div class="warning callout">
-  <p>In Firefox 43 (the latest version), images in flex columns may overflow their container. To fix this, add a defined <code>width</code> to any images inside a flex column, or use <code>width: 100%</code> for full-bleed images.</p>
+  <p>In Firefox 43+, images in flex columns may overflow their container. To fix this, add a defined <code>width</code> to any images inside a flex column, or use <code>width: 100%</code> for full-bleed images.</p>
 </div>
 
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