Slightly better, but down to less than 10fps in no time.
My laptop is an i3, so I doubt it's hardware related.
Edit: Tested in 2 different browsers (Chrome and Seamonkey), and it behaved in the same way on both.
And my dxdiag info:
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System Information
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Time of this report: 7/27/2014, 03:01:02
Machine name: -
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130104-1431)
Language: English (Regional Setting: English)
System Manufacturer: Acer
System Model: Aspire 7740
BIOS: Ver 1.00PARTTBL
Processor: Intel(R) Core(TM) i3 CPU M 370 @ 2.40GHz (4 CPUs), ~2.4GHz
Memory: 6144MB RAM
Available OS Memory: 6004MB RAM
Page File: 3440MB used, 8566MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode
---------------
Display Devices
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Card name: ATI Mobility Radeon HD 5400 Series
Manufacturer: Advanced Micro Devices, Inc.
Chip type: AMD Radeon Graphics Processor (0x68E0)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_68E0&SUBSYS_03471025&REV_00
Display Memory: 3250 MB
Dedicated Memory: 503 MB
Shared Memory: 2746 MB
Current Mode: 1600 x 900 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: unknown
Monitor Id: AUO139E
Native Mode: 1600 x 900(p) (60.307Hz)
Output Type: Internal